Um novo diterpeno kaureno, caracterizado como ácido 15alfa-decanoiloxi-kaur-16-en-19-óico, juntamente com os compostos conhecidos: ácido pentacosanóico, 24alfa-etil-5alfa-colesta-7,22E-dien-3beta-ol, ácido 15alfa-hidroxi-kaur-16-en-19-óico, 8beta-angeloil-9beta,10beta-diidroxi-1-oxo-germacra-4E ,11(13)dien-12,6alfa-olideo, 3beta-hidroxiicosan-1,5beta-olideo, acetate de taraxasterila, 7-O-metilcampferol, caempferol e nepetina foram isolados das flores de Eupatorium betonicaeforme. Adicionalmente, foram isolados das partes aéreas, o acetato de taraxasterila e a mistura binária de alfa- e beta-amirina, enquanto foram obtidos das raízes, a mistura de beta-sitosterol e estigmasterol, e 6-acetil-2,2-dimetilcroman-4-ona. A elucidação estrutural de todos os compostos isolados neste trabalho foi realizada por análise espectroscópica e comparação com dados descritos na literatura.
A new acylated kaurene diterpene, characterized as 15alpha-decanoyloxy-kaur-16-en-19-oic acid, along with nine known compounds: pentacosanoic acid, 24alpha-ethyl-5alpha-cholesta-7,22E-dien-3beta-ol, 15alpha-hydroxy-kaur-16-en-19-oic acid, 8beta-angeloyloxy-9beta,10beta-dihydroxy-1-oxo-germacra-4E,11(13)dien-12,6alpha-olide, 3beta-hydroxyeicosan-1,5beta-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 alpha- and beta-amyrin, while the mixture of beta-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.