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Frumtost Zyma S A
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Frumtost Zyma S A
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Priority to ES527509ApriorityCriticalpatent/ES527509A0/es
Publication of ES8506753A1publicationCriticalpatent/ES8506753A1/es
Publication of ES527509A0publicationCriticalpatent/ES527509A0/es
Process for the production of 16,17-[(cyclohexylmethylene) bis(oxy)]-11,21-dihydroxy-pregna-1,4-diene-3,20-dione or its 21-isobutyrate by transketalisation