VERFAHREN ZUR HERSTELLUNG VON 4-ANDROSTEN-3,17-DION UND 1,4-ANDROSTADIEN-3,17-DION

摘要

Process for the preparation of 4-androstene-3,17-dione and of 1,4-androstadiene-3,17-dione having the formula (I) wherein ..... represents a single bond or a double bond, characterized in that ergosterol of formula (II) is fermented with a culture of micro-organisms strain capable of degrading the lateral chain of sterols.