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The title compound, C 24 H 34 O 5 , a fungal-transformed metabolite of the injecta­ble contraceptive medroxyprogesterone acetate, consists of four fused rings ( A ,  B ,  C  and  D ; steroid labelling). Ring  A  exists in a half-chair conformation while  trans -fused rings  B  and  C  adopt chair conformations. The five-membered ring  D  adopts an envelope conformation with the C atom bound to the methyl group at the flap. In the crystal, adjacent mol­ecules are linked by O—H⋯O and C—H⋯O hydrogen bonds, forming infinite chains along the  a  axis.

17α-Acetoxy-11β-hydroxy-6α-methylpregn-4-ene-3,20-dione