Abstract
The products of the microbiological hydroxylation of 5β-methylestr-9-enes by the fungus Cephalosporium aphidicola have been shown to include the 3-keto-1,9-diene, the 3-keto-10β-hydroxy-9(11)-alkene and the 3-keto-11β-hydroxy-9(10)-alkene.
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