摘要:
The present invention relates to a microbiological method for producing 20beta-hydroxy-9-oxo-1,2,3,4,10,19-hexanor-5,9-secopregnan-5-oic acid, an intermediate for known steroids, from 3beta, 20beta-dihydroxypregn-5-ene or 2beta, 20-dihydroxypregn-5ene.