title: Two new 18-en-oleane derivatives from marine mangrove plant, Barringtonia racemosa.
abstract: Two new triterpenoids, olean-18-en-3beta-O-E-coumaroyl ester (1) and olean-18-en-3beta-O-Z-coumaroyl ester (2), were isolated from the stem bark of marine mangrove plant Barringtonia racemosa, along with five known compounds, germanicol, germanicone, betulinic acid, lupeol, and taraxerol. Their structures were determined mainly by spectroscopic methods.
authors.affiliation: State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Analytical and Testing Center2, Beijing Norma, People Republic of China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Yang
authors.forename: Zhiwei
authors.initials: Z
authors.lastname: Deng
authors.forename: P
authors.initials: P
authors.lastname: Proksch
authors.forename: Wenhan
authors.initials: W
authors.lastname: Lin
mesh_terms: D031382:Barringtonia / Q000737:chemistry*; D002681:China; D003374:Coumarins / Q000737:chemistry*; D000431:Ethanol; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D009828:Oleanolic Acid / Q000031:analogs & derivatives* / Q000737:chemistry; D024301:Plant Bark / Q000737:chemistry; D010936:Plant Extracts / Q000494:pharmacology; D012997:Solvents; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013055:Spectrophotometry, Infrared
chemical_list: D003374:Coumarins; D010936:Plant Extracts; D012997:Solvents; C510456:olean-18-en-3beta-O-E-coumaroyl ester; C510455:olean-18-en-3beta-O-Z-coumaroyl ester; D000431:Ethanol; D009828:Oleanolic Acid