title: Apotirucallane and Tirucallane triterpenoids from Luvunga sarmentosa.
abstract: The leaves of Luvunga sarmentosa yielded two new apotirucallane triterpenoids, 3-epi-skimmiarepin A (1) and 21,23-epoxy-7alpha,21-dihydroxyapotirucalla-14,24-dien-3-one (2), and a new tirucallane triterpene, 3-epi-flindissol (3). Because of a hemiacetal functionality at C-21, all compounds occurred as mixtures of 21-epimers. 3-epi-Skimmiarepin A (1) and 3-epi-flindissol (3) were oxidized to the corresponding gamma-lactones. The structures have been elucidated on the basis of mass and NMR spectroscopic methods.
authors.affiliation: Institute of Chemistry, National Center for Natural Science and Technology of Vietnam, Hoang Quoc Viet Road, Cau Giay, Hanoi, Vietnam.
authors.forename: Christine
authors.initials: C
authors.lastname: Kamperdick
authors.forename: Trinh Phuong
authors.initials: TP
authors.lastname: Lien
authors.forename: Guenter
authors.initials: G
authors.lastname: Adam
authors.forename: Tran Van
authors.initials: TV
authors.lastname: Sung
mesh_terms: D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010084:Oxidation-Reduction; D010946:Plants, Medicinal / Q000737:chemistry*; D027821:Rutaceae / Q000737:chemistry*; D013237:Stereoisomerism; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*; D014744:Vietnam
chemical_list: D014315:Triterpenes