24-Methylenecycloartanone

Abstract

Key indicators: single-crystal X-ray study; T = 293 K, P = 0.0 kPa; mean (C-C) = 0.004 Å; R factor = 0.052; wR factor = 0.133; data-to-parameter ratio = 14.7.The title compound, C 31 H 50 O, a tetracyclic triterpene, was isolated from Ainsliaea henryi. The molecule contains a threemembered ring, a five-membered ring, which exhibits an envelope conformation, and three six-membered rings, which adopt chair conformations. Related literatureThe title compound was first isolated from rice bran oil, see: Ohta & Shimizu (1958)