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New triterpene isolated from Eschweilera longipes (Lecythidaceae)
Patrícia M da Costa1, Mário G de Carvalho
1Departamento de Química, ICE, Universidade Federal Rural do Rio de Janeiro 23851-970 Seropédica, RJ, Brazil.
Anais Da Academia Brasileira De Ciencias
|April 26, 2003
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.