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The title compound, C 16 H 16 O 7 , isolated from  Kaempferia rotunda  rhizomes, features a six-membered cyclo­hexane ring that adopts a twisted-boat conformation owing to the presence of two adjacent epoxide attachments that lock in four of the six axial positions. The CH 3 CO 2 – and HO– substituents occupy equatorial positions. However, the bond angles at the ring carbon connected to the C 6 H 5 CO 2 CH 2 – substituent deviate signifcantly from the idealized tetra­hedral angles as the carbon atom is part of an epoxide ring.  In the crystal, the molecules are linked into chains by O—H⋯O hydrogen bonds.

acta crystallographica. section e

[1R-(1α,2α,4α,5β,6α,7α)]-4-Benzoyloxymethyl-5,6-dihydroxy-3,8-dioxatricyclo[5.1.0.02,4]octan-5-yl acetate (3-deacetylcrotepoxide) fromKaempferia rotundaVal.