Abstract
The microorganism Mucor piriformis transforms androst-4-ene-3,17-dione into a major and several minor metabolites. X-ray cristallographic analysis of two of these metabolites was undertaken to determine unambiguously their composition and chirality. Crystals belong to the orthorhombic space-group P2 12 12 1, with a = 7.199(4) A ̊ and a = 6.023(3) A ̊ , b = 11.719(3) A ̊ and b = 13.455(4) A ̊ c = 20.409(3) A ̊ and c = 20.702(4) A ̊ for the two title compounds, respectively. The structures have been refined to final R values of 0.060 and 0.040, respectively. (Steroids 56:440–445, 1991)
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