The solution concerns a method of preparation of 2α, 3α-dihydroxy-17-(3-methyl-butyryloxy)-7-oxa-B-homo-5α-androstane-6-one by direct oxidation of 2α, 3α-dihydroxy-17β-(3-methyl-butyryloxy)-5α-androstane-6-one by peroxy acid.
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