title: Four new triterpenes from the heartwood of melaleuca leucadendron
abstract: Four new triterpenes, eupha-7,24-diene-3beta,22beta-diol (1), 20-taraxastene-3alpha,28-diol (2), 3alpha,27-dihydroxy-28, 20beta-taraxastanolide (3), and 3alpha-hydroxy-13(18)-oleanene-27, 28-dioic acid (4) have been isolated from the heartwood of Melaleuca leucadendron. The structures and stereochemistry of 1-4 have been determined by spectroscopic analysis, with compounds 3 and 4 being investigated in the forms of their diacetate (3a) and dimethyl (4a) derivative, respectively.
authors.affiliation: China Junior College of Medical Technology, Tainan, Taiwan, Republic of China.
authors.initials: CK
authors.lastname: Lee
authors.initials: MH
authors.lastname: Chang