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On steroids. LXV. Microbiological hydroxylation of 18-substituted steroids. Partial synthesis of 11β-hydroxy-3,20-dioxopregn-4-en-18-oic acid (18→11) lactone from (20R)-20-hydroxy-3-oxopregn-4-en-18-oic acid (18→20) lactone
L. Lábler and F. Šorm
This article is part of serial On steroids.