A análise química de Diplotropis ferruginea Benth. resultou no isolamento da 3-metoxiflavona, 3-metoxi-6-O-prenil-6",6"-dimetilcromeno-(7,8,2",3")-flavona, à qual foi dado o nome trivial de diploflavona (1), bem como da 3,6-dimetoxi-6",6"-dimetilcromeno-(7,8,2",3")-flavona (2). A estrutura do novo composto foi estabelecida por análises espectrais. A atividade citotóxica dos compostos isolados foi testada contra células NCI-H292 (carcinoma de pulmão), HEp-2 (carcinoma de laringe) e KB (carcinoma epidermóide oral). As células HEp-2 foram as mais afetadas pelas substâncias testadas.
The chemical examination of Diplotropis ferruginea Benth. resulted in the isolation of a new 3-methoxyflavone, 3-methoxy-6-O-prenyl-6",6"-dimethylchromene-(7,8,2",3")-flavone, to which was given the trivial name diploflavone (1); as well as the known 3,6-dimethoxy-6",6"-dimethylchromene-(7,8,2",3")-flavone (2). The structure of the new compound was established by spectral analyses. Cytotoxic activity of the isolated compounds was tested against the cells NCI-H292 (lung carcinoma), HEp-2 (larynx carcinoma) and KB (oral epidermoid carcinoma). The cells HEp-2 were the most affected by the substances tested.