Process for the production of 4-androstene-3,17-dione and 1,4- androstadiene-3,17-dione from ergosterol with mycobacterium

摘要

A process for the production of 4-androstene-3,17-dione and 1, 4- androstadiene-3,17-dione of the general formula ##STR1## wherein . . . . . symbolizes a single bond or a double bond, characterized in that ergosterol ##STR2## is fermented with a culture of a microorganism strain capable of side-chain degradation of sterols.