Constituents of Boesenbergia sp. Isolation and crystal structure of crotepoxide ([1R-(1α,2α,4α,5β,6α,7α,)]-4-[(Benzoyloxy)methyl]-3,8-dioxatricyclo[5, 1,0,02,4]octane-5,6-diyl diacetate)

The crystal structure of crotepoxide, isolated from the rhizomes of Boesenbergia sp., has been determined by single crystal X-ray diffraction methods at 295 K, being refined to a residual of 0.059 for 682 independent 'observed' reflections. Crystals are orthorhombic, P212121, a 23.53(2), b 10.59(1),c, 6.99(1)A, Z 4.