title: Cucurbitane-type triterpenoids from Momordica charantia.
abstract: Five new cucurbitane-type triterpenes, (23E)-25-methoxycucurbit-23-ene-3beta,7beta-diol (1), (23E)-cucurbita-5,23,25-triene-3beta,7beta-diol (2), (23E)-25-hydroxycucurbita-5,23-diene-3,7-dione (3), (23E)-cucurbita-5,23,25-triene-3,7-dione (4), and (23E)-5beta,19-epoxycucurbita-6,23-diene-3beta,25-diol (5), together with one known triterpene, (23E)-5beta,19-epoxy-25-methoxycucurbita-6,23-dien-3beta-ol (6), have been isolated from the methanol extract of the stems of Momordica charantia. The structures of the new compounds were elucidated by spectroscopic methods.
authors.affiliation: Graduate Institute of Biotechnology, National Pingtung University of Science and Technology, Pingtung 912, Taiwan, Republic of China.
authors.forename: Chi-I
authors.initials: CI
authors.lastname: Chang
authors.forename: Chiy-Rong
authors.initials: CR
authors.lastname: Chen
authors.forename: Yun-Wen
authors.initials: YW
authors.lastname: Liao
authors.forename: Hsueh-Ling
authors.initials: HL
authors.lastname: Cheng
authors.forename: Yo-Chia
authors.initials: YC
authors.lastname: Chen
authors.forename: Chang-Hung
authors.initials: CH
authors.lastname: Chou
mesh_terms: D015394:Molecular Structure; D029777:Momordica charantia / Q000737:chemistry*; D019906:Nuclear Magnetic Resonance, Biomolecular; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D013624:Taiwan; D014315:Triterpenes / Q000737:chemistry / Q000145:classification / Q000302:isolation & purification
chemical_list: D014315:Triterpenes