Thaixylomolins D-F, new limonoids from the Thai true mangrove, Xylocarpus moluccensis

摘要

Three new limonoids, named thaixylomolins D-F (1-3), were obtained from the seeds of a Thai true mangrove, Xylocarpus moluccensis. The structures of these compounds were identified by extensive NMR and HR-ESIMS/MS investigations. They are further additions to the small group of phragmalins with a C-30 carbonyl moiety, among which thaixylomolins D-E (1-2) contain a Delta(8,14) double bond, whereas thaixylomolin F (3) possesses conjugated Delta(8,9) and Delta(14,15) double bonds