Process for producing 4-androstene-3,17-dione or 1,4-androstadiene-3,17-dione

摘要

A process for the production of 4-androstene-3,17-dione and 1,4-androstadiene-3,17-dione of the general formula IMAGE wherein . . . . . symbolizes a single bond or a double bond, characterized in that ergosterol IMAGE is fermented with a culture of a microorganism strain capable of side-chain degradation of sterols.