title: Triterpenes from the resin of Protium heptaphyllum.
abstract: From the neutral fraction of the resin of Protium heptaphyllum, a mixture of alpha- and beta-amyrin, a mixture of maniladiol and brein have been isolated as main components, and the novel 3 beta,24-dihydroxy-urs-12-ene (1), 3-oxo-20S-hydroxytaraxastane (2) and 3 beta,20S-dihydroxytaraxastane (3) as minor components. NMR data of the last three compounds are provided.
authors.affiliation: Laboratório de Química de Produtos Naturais e Farmacologia Aplicada, Far-Manguinhos, FIOCRUZ, Rio de Janeiro, Brazil.
authors.forename: G S
authors.initials: GS
authors.lastname: Susunaga
authors.forename: A C
authors.initials: AC
authors.lastname: Siani
authors.forename: M G
authors.initials: MG
authors.lastname: Pizzolatti
authors.forename: R A
authors.initials: RA
authors.lastname: Yunes
authors.forename: F
authors.initials: F
authors.lastname: Delle Monache
mesh_terms: D029403:Burseraceae; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D012116:Resins, Plant / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry*
chemical_list: D012116:Resins, Plant; D014315:Triterpenes