title: New triterpene isolated from Eschweilera longipes (Lecythidaceae).
abstract: The phytochemical studies of Eschweilera longipes Miers (Lecythidaceae) have led to the identification of a new triterpene 3beta, 24-dihydroxyfriedelane, the known 1beta, 2beta, 3beta, 19beta-tetrahydroxyurs-12-en-28-oic acid (1beta-hydroxyeucaphic acid) besides the saponin sitosterol 3betaO-betaD-glucopyranoside. The structures were established from the IR, NMR and mass spectra data including 2D NMR experiments of natural substances and of the acetyl derivative of the new triterpene.
authors.affiliation: Departamento de Química, ICE, Universidade Federal Rural do Rio de Janeiro 23851-970 Seropédica, RJ, Brazil.
authors.forename: Patrícia M
authors.initials: PM
authors.lastname: da Costa
authors.forename: Mário G
authors.initials: MG
authors.lastname: de Carvalho
mesh_terms: D031381:Lecythidaceae / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D018515:Plant Leaves / Q000737:chemistry; D013057:Spectrum Analysis; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*; D014934:Wood
chemical_list: D014315:Triterpenes