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The title compound, C 19 H 28 O 3 , the fungal-transformed metabolite of the steroid methyl­oestrenol contains four fused rings  A ,  B ,  C  and  D . Ring  A  adopts a half-chair and the  trans -fused rings  B  and  C  adopt chair confirmations; the five-membered  D  ring is folded like an envelope. In the crystal, adjacent mol­ecules are linked by O—H⋯O carbon­yl  and O—H⋯O hy­droxy  hydrogen bonds into a layer structure.

17β-Hydroxy-17α-(hydroxymethyl)estr-4-en-3-one