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US 4,397,946 AGranted
Process for preparing androstane steroids
AssigneeMitsubishi Chemical Industries Limited
InventorsYukio Imada, Tetsu Osozawa, Yuki Morimoto, Masayuki Kinoshita
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Abstract
Androstane steroids are produced by microbiological conversion of a sterol substrate with a microorganism belonging to the genus Mycobacterium wherein the medium used contains at least 0.1% by weight of egg yoke as a dry weight.
Claims11
A process for producing an androstane steroid which comprises converting a sterol substrate with a microorganism of the genus Mycobacterium using a culture medium containing at least 0.1% by weight of dry egg yolk.
Dependencies are inferred from the claim text.