CN1186336C - Prepn and application in preparing medicine of fraxinus general coumarin - Google Patents
Prepn and application in preparing medicine of fraxinus general coumarin Download PDFInfo
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- CN1186336C CN1186336C CNB021336806A CN02133680A CN1186336C CN 1186336 C CN1186336 C CN 1186336C CN B021336806 A CNB021336806 A CN B021336806A CN 02133680 A CN02133680 A CN 02133680A CN 1186336 C CN1186336 C CN 1186336C
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
- C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D311/04—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
- C07D311/06—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 2
- C07D311/08—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 2 not hydrogenated in the hetero ring
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/335—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
- A61K31/365—Lactones
- A61K31/366—Lactones having six-membered rings, e.g. delta-lactones
- A61K31/37—Coumarins, e.g. psoralen
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K36/00—Medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicines
- A61K36/18—Magnoliophyta (angiosperms)
- A61K36/185—Magnoliopsida (dicotyledons)
- A61K36/63—Oleaceae (Olive family), e.g. jasmine, lilac or ash tree
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P19/00—Drugs for skeletal disorders
- A61P19/06—Antigout agents, e.g. antihyperuricemic or uricosuric agents
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Abstract
The present invention relates to a condensation and purification method of cortex fraxini total coumarin. Gout has the characteristics of latent pathogenesis and difficult radical treatment; chemical medicines have the defects of large toxic or side effects to different extents; though the treatment of traditional Chinese medicines to gout obtains favorable effects, because of the complexity of the traditional Chinese medicines and compound formulas, effective components are difficult to determine, and accordingly, clinical treating effects are difficult to accurately evaluate. Simultaneously, since the component contents of the traditional Chinese medicines are different because of the difference of producing areas and batch orders, the quality of the Chinese patent medicine is caused to difficult to control. Referring to the defects of compound Chinese patent medicines, a new purpose of extract of cortex fraxini used as a single traditional Chinese medicine-cortex fraxini total coumarin is provided; a new purpose of aesculin is also provided; the single traditional Chinese medicine cortex fraxini-cortex fraxini total coumarin and the aesculin can have obvious action on delivering pain, resisting inflammation and reducing the blood uric acid of patients, and the present invention has obvious treating action on acute and chronic gout. The total effective rate is 90%; the excellence rate 56.7%, and obvious toxic or side action is not generated. The present invention has the advantages of clear effective component, outstanding treating effect and small toxic or side effect. The present invention also provides a convenient preparation method of cortex fraxini total coumarin, particularly a condensation and purification method of cortex fraxini total coumarin.
Description
Technical field:
The present invention relates to a kind of preparation method and application thereof of Cortex Fraxini extract, the particularly preparation method of bark of ash total coumarins and the purposes in pharmacy field thereof.
Background technology:
Gout is to be reduced and the hyperamization uric acid continues to increase and is the basic cause of disease by purine metabolic disturbance or uric acid excretion, causes the disease of various pathologies, belongs to the metabolic rheumatosis.This disease belongs to traditional Chinese medical science bi Zheng, gout, go through category such as joint, is meant outer evil retardance channels and collaterals, coagulation of QI-blood, the pain of joint muscle numbness that liver kidney two void cause, weighing, the illness of joint stuffiness.Hyperuricemia is the pathogenesis basis of gout, and it and gout are the different stepss of same disease, is the state in early stage of gout.The clinical characters of gout is that hyperuricemia, acute and chronic sacroiliitis are shown effect and the uratoma precipitation repeatedly, and severe patient can cause joint movement disorder, deformity, kidney urate calculus or gouty kidney essence pathology.The complication of life threatenings such as its nephropathy, coronary heart disease, hypertension is also higher.
Gout and hyperuricemia have become the world today, common ailment of middle-aged and old especially, and its sickness rate is 6%-13%.Along with the change of dietary structure and environmental factors, the prolongation of expanding economy and human longevity, the sickness rate of gout and hyperuricemia improves day by day.In China, because the generally raising of living standards of the people, animal food is taken in to be increased, and the generation of this disease is ascendant trend linearly, and its sickness rate is near developed country's level (0.35%); Visit by outpatient service, this disease is also ascendant trend linearly of sickness rate in the teenager.
Gout has the advantages that morbidity is hidden, difficulty is effected a radical cure, and the clinical treatment gout mainly contains two purposes, in time controls the acute attack of urarthritis; The long-term treatment hyperuricemia, prevention uratic deposit and gout acute relapse promote tophaceous absorption.The control medicine of the acute attack of urarthritis mainly contains colchicine, NSAID (non-steroidal anti-inflammatory drug) and adrenocortical hormones.Hyperuricemia control medicine mainly contains two big classes: a class is to disturb the medicine of uriniferous tubules to uric acid excretion, as narcaricin, probenecid, Zynol etc.; Another kind of is the xanthine oxidase inhibitor that can suppress uricogenesis, and representing medicine is Zyloric.All there is the big shortcoming of toxic side effect in various degree in the above pharmaceutical chemicals, and especially long-term prescription is more obvious, often needs to take medicine for a long time and treat this disease.
Over past ten years, the Chinese medicine gout has obtained better effects, and toxic side effect is few, is easily accepted by the patient, the purpose of reach long-term prescription, preventing and curing diseases.But the Chinese medicine that uses is based on compound at present, do not appear in the newspapers as yet the preparation of single medicinal material extract as the treatment gout arranged, because the complicacy of Chinese medicine and compound itself, be difficult to determine effective constituent, therefore, be difficult to accurately estimate clinical efficacy, simultaneously, because traditional Chinese medicine ingredients content because of the place of production, batch difference are different, causes the control that is difficult to of Chinese patent medicine quality.
Summary of the invention:
At the shortcoming of compound Chinese patent medicine, we provide a kind of extract of the single medicinal material bark of ash--and the new purposes of bark of ash total coumarins, obviously the effect of throe, anti-inflammatory and reduction patient blood uric acid has the obvious treatment effect to the acute and chronic gout.Total effective rate is 90%, and obvious effective rate 56.7% is not seen obvious toxic-side effects, and its effective constituent is clear, determined curative effect, toxic side effect are little.
The present invention also provides a kind of preparation method of easy bark of ash total coumarins, exactly is the concentrated and purified method of bark of ash total coumarins.
Technical scheme of the present invention is: bark of ash medicinal material is cut into particulate state, adopts a. poach alcohol deposition method, ethanol content is that the 50%-90% extraction obtains Cortex Fraxini extract medicinal extract; B. medicinal extract is placed 4-12 ℃ of refrigeration down, 8-24 hour, form precipitation; C. filter and obtain precipitation and dry, promptly get bark of ash total coumarins.Bark of ash total coumarins adds the medicine that pharmaceutically acceptable carrier or vehicle can be used for preparing treatment acute and chronic gout as activeconstituents.The advantage of this medicine is: effective constituent is clear, determined curative effect, do not see obvious toxic and side effects, and total effective rate is 90%, obvious effective rate 56.7%.
Below by pharmacological evaluation and result the new purposes of bark of ash total coumarins in pharmacy field described.
Get bark of ash 100kg, be cut into particulate state, extracting in water three times is condensed into medicinal extract with the water extract, add 2.5 times of amount ethanol, alcohol precipitation, filtration, ethanol liquid is reclaimed solvent, and to be condensed into proportion be 1.0 medicinal extract, places 4 ℃ of refrigerations 8 hours then, filter, collecting precipitation, drying obtains bark of ash total coumarins 1.70kg.The bark of ash total coumarins adding distil water that makes is diluted to the aqueous solution of needed various concentration, sterilization, standby.
1, acute toxicity test
Get 50 of the Kunming mouses of 18-21g male and female half and half, fasting 12 hours, can't help water, with concentration is that 16.38% bark of ash total coumarins solution is irritated stomach 0.4ml/10gB.W., observed 7 days the reaction of record animal toxicity, repetition measurement body weight after 7 days continuously, not produce dead maximal dose is the maximum tolerated dose (MTD) of an oral administration, and extrapolates the multiple that this dosage is equivalent to clinical every day of recommended drug amount.Above-mentioned test-results shows, bark of ash total coumarins mouse is once irritated stomach maximum tolerated dose MTD＞6.55g (total coumarins)/Kg (be equivalent to clinical every day of recommended dose 655 times).Outward appearance behavior, the mental status, body weight, stool and urine and the color thereof of animal, quilt hair, the colour of skin, breathing, nose, eye, oral secretion etc. there is no unusually after the administration, dissect during off-test and do not see obvious pathological change.Performance judges that bark of ash total coumarins belongs to no overt toxicity medicine after acute toxicity institute's amount of reagent of bark of ash total coumarins and the administration.
2, long term toxicity test:
260 of one-level Wistar rats with 80～110 gram male and female half and half are experimental animal, are divided into 4 groups at random, are respectively basic, normal, high three dosage groups and a control group, adopt administration by gavage, and 9 o'clock～10 o'clock morning of every day is special messenger's administration regularly.With concentration is 8% bark of ash total coumarins solution for high dose group usefulness, and be diluted in proportion 4%, 2% soup respectively in dosage group and low dose group use.With isoconcentration equal-volume soup gastric infusion every day not once, irritate that body of stomach is long-pending to be 1ml/100g body weight, continuous 3 months.Contrast is given and is irritated stomach equal-volume distilled water.Experiment periods is weighed once weekly, and adjusts dosage by new body weight.After the administration 3 months, 3 dosage groups and control group respectively stay 1/3 animal and do not give and be subjected to the reagent thing, continue to observe for 2 weeks, with the degree of reversibility of understanding toxic reaction and the retardance toxicity that may occur.Observation index comprises: general performance, as animal food-intake, body weight, outward appearance sign, behavioral activity, ight soil proterties etc.; Hematological indices, blood parameters; System becomes celestial and histopathologic examination.Above-mentioned test-results shows that each dosage group of trial drug there is no the overt toxicity reaction.
3, pharmacodynamics test:
New zealand white rabbit with 2.5～3.0 kilograms of Wistar rat, the body weight of body weight 220～250 gram is an experimental animal.The maxima solubility of bark of ash total coumarins in cold water is 16.38%, but under heat-retaining condition, its solubleness can be brought up to more than 50%.We with the aqueous solution of bark of ash total coumarins as for the reagent thing, the results showed, micro-crystal type uric acid sodium suspension local injection is brought out rat acute foot pawl swelling to the bark of ash total coumarins gastric infusion of different concns and the arthroncus of rabbit acute gouty arthritis all has remarkable restraining effect, and can reduce rabbit acute gouty arthritis arthroedema amount, alleviate pathological changes such as the hyperemia of joint capsule tissue, oedema, degeneration necrosis and lymphocyte, neutrophilic infiltration.This medicine also all has remarkable reduction effect to normal mouse blood uric acid and high lithemia mouse blood uric acid.Bark of ash total coumarins causes the mouse writhing reaction times to acetate remarkable minimizing effect, also has the effect of certain prolongation mouse hot plate threshold of pain, shows that this medicine has certain analgesic activity.Bark of ash total coumarins p-Xylol causes the chmice acute ear swelling, the carrageenin local injection brings out all significantly antagonistic actions of rat foot claw swelling, can alleviate cotton balls and stimulate granulation midship weight, the leukoplania that can increase and cause to the capillary permeability that anti-inflammatory causes, show that bark of ash total coumarins has sure anti-inflammatory action, can act on inflammation initial stage and later stage.Above result shows that bark of ash total coumarins has the experimental urarthritis arthroncus of inhibition, alleviates the membrana synovialis capsulae articularis histo pathological change, reduces many-sided pharmacological action relevant with gout treatment such as blood uric acid and pain relieving, anti-inflammatory, detumescence.
Table 1 bark of ash total coumarins brings out the acutely inflamed influence of rat foot claw to micro-crystal type uric acid sodium
Before causing inflammation
Number of animals dosage cause scorching back foot swelling rate (x ± s, %)
Group foot volume
(only) (mg/Kg
*D)
(ml) 1hr 2hr 4hr 6hr 8hr
26.79 33.91 42.10 46.14
Contrast 1.59 ± 16.23 ±
10 - ± ± ± ±
Organize 0.09 8.42
12.05 15.84 14.14 12.13
16.30 20.36 20.95 32.43
Total perfume 1.60 ± 11.80 ±
10 40*3 ± ± ± ±
Legumin 0.11 7.28
7.03 9.16 7.85 10.94
10.46 16.99 14.86 23.56
Total perfume 1.59 ± 9.38 ±
10 80*3 ± ± ± ±
Legumin 0.11 4.87
5.12 8.66 8.41 8.79
12.20 12.93 14.04 26.69
Total perfume 1.63 ± 8.01 ±
10 160*3 ± ± ± ±
Legumin 0.15 5.73
6.03 7.74 8.05 8.72
11.24 11.79 10.71 21.50
Total perfume 1.59 ± 8.26 ±
10 320*3 ± ± ± ±
Legumin 0.08 5.81
7.38 7.11 7.54 10.15
12.77 10.89 8.93 9.71
Autumn waters--limid eyes 1.61 ± 8.02 ±
10 0.8*3 ± ± ± ±
Celestial alkali 0.11 4.36
5.79 5.79 5.27 5.94
Table 2 bark of ash total coumarins brings out the arthritic arthroncus rate of rabbit acute gout influence (x ± s) to MSU
Group number of animals (only) dosage (mg/Kg
*D) swelling rate (%)
Normal control 8-0 ± 0
Model contrast 9-10.89 ± 5.86
Bark of ash total coumarins 8 20 * 4 3.30 ± 3.16
Bark of ash total coumarins 8 40 * 4 3.12 ± 1.73
Bark of ash total coumarins 9 80 * 4 2.89 ± 2.03
Bark of ash total coumarins 9 160 * 4 4.89 ± 2.52
Colchicine 9 0.4 * 4 4.00 ± 1.58
Indomethacin 9 20 * 4 4.67 ± 2.55
Table 3 bark of ash total coumarins is to the influence of hyperuricemia mouse blood uric acid (x ± s)
Group number of animals (only) dosage (mg/Kg
*D) blood uric acid (μ mol/L)
Normal control 10-89.39 ± 32.75
Model contrast 10-173.65 ± 46.57
Bark of ash total coumarins 10 50 * 92.97 ± 25.11
Bark of ash total coumarins 10 100 * 5 83.36 ± 18.40
Bark of ash total coumarins 10 200 * 5 85.60 ± 16.32
Bark of ash total coumarins 10 400 * 5 68.61 ± 10.00
Zyloric 10 100 * 5 67.16 ± 5.71
With the bark of ash total coumarins that makes formulation method according to routine, make capsule, specification is the 200mg/ grain, and 30 routine gout patients are carried out clinical observation, the result is as follows:
Table 4 clinical observation table
The total obvious effective rate (%) of example number dose Time of Administration total effective rate (%)
1/time of 30 example 30 days 90 56.7
3 times/day
After measured, in the bark of ash total coumarins of gained, aesculin content surpasses 60%, and for the further pharmacological action of research aesculin, we adopt following method to separate and obtain aesculin: with warm dissolve with methanol, recovery part methyl alcohol, be concentrated into the methyl alcohol saturated solution of aesculin, placement is spent the night, and obtains yellow needle, through methyl alcohol, water repeatedly recrystallization obtain aesculin, purity 94.4%.The solubleness of aesculin in water is close with bark of ash total coumarins, and we as for the reagent thing, are experimental animal with the new zealand white rabbit of 2.5～3.0 kilograms of Wistar rat, the body weight of body weight 220～250 grams with the aesculin aqueous solution.The results showed, micro-crystal type uric acid sodium suspension local injection is brought out rat acute foot pawl swelling to the aesculin gastric infusion of different concns and the arthroncus of rabbit acute gouty arthritis all has remarkable restraining effect, and can reduce rabbit acute gouty arthritis arthroedema amount, alleviate pathological changes such as the hyperemia of joint capsule tissue, oedema, degeneration necrosis and lymphocyte, neutrophilic infiltration.Aesculin also all has remarkable reduction effect to normal mouse blood uric acid and high lithemia mouse blood uric acid.Aesculin causes the mouse writhing reaction times to acetate remarkable minimizing effect, also has the effect of certain prolongation mouse hot plate threshold of pain, shows that this medicine has certain analgesic activity.The aesculin p-Xylol causes the chmice acute ear swelling, the carrageenin local injection brings out all significantly antagonistic actions of rat foot claw swelling, can alleviate cotton balls and stimulate granulation midship weight, the leukoplania that can increase and cause to the capillary permeability that anti-inflammatory causes, show that aesculin has sure anti-inflammatory action, can act on inflammation initial stage and later stage.Above result shows that aesculin has the experimental urarthritis arthroncus of inhibition, alleviates the membrana synovialis capsulae articularis histo pathological change, reduces many-sided pharmacological action relevant with gout treatment such as blood uric acid and pain relieving, anti-inflammatory, detumescence.
Table 5 aesculin brings out the (x ± s) of rabbit acute gouty arthritis arthroedema amount to MSU
The arthroedema amount
Group number of animals (only) dosage (mg/Kg
*D)
(ml)
Normal control 8-0 ± 0
Model contrast 9-0.309 ± 0.106
Aesculin 8 20 * 4 0.189 ± 0.094
Aesculin 8 40 * 4 0.170 ± 0.055
Aesculin 9 80 * 4 0.214 ± 0.108
Aesculin 9 160 * 4 0.160 ± 0.060
Colchicine 9 0.4 * 4 0.241 ± 0.137
Indomethacin 9 20 * 4 0.140 ± 0.101
Table 6 aesculin is to the influence of hyperuricemia mouse blood uric acid (x ± s)
Group number of animals (only) dosage (mg/Kg
*D) uric acid (μ mol/L)
Normally to 10-69.34 ± 22.35
Model is to 10-74.25 ± 16.57
Aesculin 10 50 * 192.97 ± 55.11
Aesculin 10 100 * 5 63.34 ± 10.40
Aesculin 10 200 * 5 82.23 ± 15.42
Aesculin 10 400 * 5 88.51 ± 16.20
Zyloric 10 100 * 5 65.25 ± 8.36
The invention will be further described below in conjunction with embodiment:
Embodiment one
Get bark of ash 100kg, be cut into particulate state, extracting in water three times is condensed into medicinal extract with the water extract, add 3.5 times of amount ethanol, alcohol precipitation, filtration, ethanol liquid is reclaimed solvent, and to be condensed into proportion be 1.1 medicinal extract, places 8 ℃ of refrigerations 10 hours then, filter, collecting precipitation, drying obtains bark of ash total coumarins 2.15kg.
Embodiment two
Get bark of ash 100kg, be cut into particulate state, extracting in water three times is condensed into medicinal extract with the water extract, add 5 times of amount ethanol, alcohol precipitation, filtration, ethanol liquid is reclaimed solvent, and to be condensed into proportion be 1.2 medicinal extract, places 12 ℃ of refrigerations 12 hours then, filter, collecting precipitation, drying obtains bark of ash total coumarins 2.22kg.
Embodiment three
With embodiment one or embodiment two gained bark of ash total coumarins 2kg, or other well known to a person skilled in the art method, obtain bark of ash total coumarins as making with alcohol extracting alcohol deposition method or alcohol extracting method behind the medicinal extract to concentrate with macroreticular resin absorbing method, method according to conventional formulation, add suitable vehicle, making specification is the bark of ash total coumarins capsule of 200mg/ grain.
Embodiment four
With the bark of ash total coumarins 2kg that makes, according to the method for conventional formulation, add suitable vehicle, making specification is the bark of ash total coumarins tablet of 200mg/ sheet.
Embodiment five
With the bark of ash total coumarins 2kg that makes, according to the method for conventional formulation, add suitable vehicle, making specification is the bark of ash total coumarins granule of 200mg/ bag.
Embodiment six
With the bark of ash total coumarins 2kg that makes, with warm (40-50 ℃) methyl alcohol 3000ml dissolving, recovery part methyl alcohol, be concentrated into the methyl alcohol saturated solution of aesculin, placement is spent the night, and obtains yellow needle, through methyl alcohol, water repeatedly recrystallization obtain aesculin 1.91kg, purity is 94.4%.Making specification respectively according to the method for embodiment three, four, five then is 200mg aesculin capsule, tablet and granule.
Claims (2)
1, a kind of preparation method of bark of ash total coumarins comprises:
A. use the poach alcohol deposition method, ethanol content is that the 50%-90% extraction obtains Cortex Fraxini extract medicinal extract;
B. medicinal extract is placed 4-12 ℃ to refrigerate 8-24 hour down, form precipitation;
C. filter and obtain precipitation and dry, promptly get bark of ash total coumarins.
2, the application of bark of ash total coumarins in the medicine of preparation treatment acute and chronic gout for preparing with the described preparation method of claim 1.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021336806A CN1186336C (en) | 2002-08-29 | 2002-08-29 | Prepn and application in preparing medicine of fraxinus general coumarin |
| PCT/CN2003/000191 WO2004020427A1 (en) | 2002-08-29 | 2003-03-17 | The process for preparation of total coumarins from cortex fraxini and their use in medicine |
| AU2003221296A AU2003221296A1 (en) | 2002-08-29 | 2003-03-17 | The process for preparation of total coumarins from cortex fraxini and their use in medicine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021336806A CN1186336C (en) | 2002-08-29 | 2002-08-29 | Prepn and application in preparing medicine of fraxinus general coumarin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1398861A CN1398861A (en) | 2003-02-26 |
| CN1186336C true CN1186336C (en) | 2005-01-26 |
Family
ID=4747332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021336806A Expired - Fee Related CN1186336C (en) | 2002-08-29 | 2002-08-29 | Prepn and application in preparing medicine of fraxinus general coumarin |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN1186336C (en) |
| AU (1) | AU2003221296A1 (en) |
| WO (1) | WO2004020427A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1923194B (en) * | 2005-09-01 | 2011-08-17 | 成都恩威药业有限公司 | Cortex fraxini coumarin composition |
| CN101129394B (en) * | 2006-08-21 | 2011-03-23 | 中国医学科学院药物研究所 | New use of aesculin in preventing and/or treating cardiovascular disease |
| CN101168540B (en) * | 2006-10-27 | 2010-09-29 | 郭颂 | Method for extracting cortex fraxini coumarin |
| CN102631419B (en) * | 2012-04-28 | 2014-04-02 | 重庆市中药研究院 | Medicine composition for treating gout, as well as preparation method and application of medicine composition |
| CN104147031B (en) * | 2014-07-28 | 2016-08-17 | 李珊珊 | A kind of antineoplastic pharmaceutical compositions containing aseculin |
| CN110819665B (en) * | 2019-10-21 | 2023-02-24 | 苏州大学 | Preparation method of 6,7,8-trihydroxy coumarin |
| CN114767737B (en) * | 2022-06-21 | 2022-11-29 | 上海中医药大学 | Cortex fraxini extract, preparation method and application thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5376372A (en) * | 1989-07-11 | 1994-12-27 | Steigerwald Arzneimittelwerk Gmbh | Analgesic and inflammation-reducing medicament |
| JPH06312925A (en) * | 1993-03-02 | 1994-11-08 | Kureha Chem Ind Co Ltd | Cartilage-protection agent and new esculetin derivative |
| CN1250664A (en) * | 1999-09-07 | 2000-04-19 | 陶金山 | Chinese medicine for treating gout |
-
2002
- 2002-08-29 CN CNB021336806A patent/CN1186336C/en not_active Expired - Fee Related
-
2003
- 2003-03-17 WO PCT/CN2003/000191 patent/WO2004020427A1/en not_active Application Discontinuation
- 2003-03-17 AU AU2003221296A patent/AU2003221296A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| WO2004020427A1 (en) | 2004-03-11 |
| CN1398861A (en) | 2003-02-26 |
| AU2003221296A1 (en) | 2004-03-19 |
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