title: 2α-Acet-oxy-5α-methoxy-caryophyll-8(15)-en-3-one.
abstract: The title compound, C(18)H(28)O(4), crystallizes with two mol-ecules in the asymmetric unit. Both mol-ecules have similar conformations of nine-membered rings, which are trans-fused with cyclo-butane fragments. The puckering amplitudes (q2) of the cyclo-butane rings are 0.2451 (2) and 0.2526 (2) Å.
authors.affiliation: School of Pharmacy, Tianjin Medical University, Tianjin 300070, People's Republic of China.
authors.forename: Wen
authors.initials: W
authors.lastname: Zhang
authors.forename: Hong-Quan
authors.initials: HQ
authors.lastname: Duan