Terpenoids, flavonoids and other constituents of eupatorium betonicaeforme (Asteraceae)

Abstract

A new acylated kaurene diterpene, characterized as 15α-decanoyloxy- kaur-16-en-19-oic acid, along with nine known compounds: pentacosanoic acid, 24α-ethyl-5α-cholesta-7,22E-dien-3β-ol, 15α-hydroxy-kaur- 16-en-19-oic acid, 8β-angeloyloxy-9β, 10β-dihydroxy-l- oxogermacra-4E,11(13)dien-12,6α-olide, 3β-hydroxyeicosan-1, 5β-olide, taraxasteryl acetate, 7-O-methylkaempferol, kaempferol, and nepetin were isolated from the flowers of Eupatorium betonicaeforme (Asteraceae). In addition, from the aerial parts were isolated taraxasteryl acetate and α- and β-amyrin, while the mixture of β-sitosterol and stigmasterol, and 6-acetyl-2,2-dimethylchroman-4-one were isolated from the roots. The structure elucidation of all compounds was performed by spectroscopic analysis and comparison with published data from literature. ©2006 Sociedade Brasileira de Química.