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Updated: Jun 27, 2026

Cellular Lipid Extraction for Targeted Stable Isotope Dilution Liquid Chromatography-Mass Spectrometry Analysis
Published on: November 17, 2011
Two new 11alpha,12alpha-epoxy-ursan-28,13beta-olides and other triterpenes from Cecropia catharinensis
E C Machado1, R A Yunes, A Malheiros
1Departamento de Quimica, Universidade Federal de Santa Catarina, Florianopolis-SC, Brazil.
Abstract:
Three new triterpenes, 2alpha-acetoxy-3beta,19alpha-dihydroxy-11alpha,12alpha-epoxy-ursan-28,13beta-olide, 3beta-acetoxy-2alpha,19alpha-dihydroxy-11alpha,12alpha-epoxy-ursan-28,13beta-olide and 2-O-acetyl-euscaphic acid together eight known triterpenes were isolated from the roots and stems of Cecropia catharinensis. Their structures were determined by detailed analysis of NMR spectra and the relative configurations established by difference nOe experiments. In addition, four flavonoid glucosides (vitexin, isovitexin, orientin and isoorientin) were found in the leaves.
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