1990 Volume 38 Issue 10 Pages 2746-2749
Four new des-4-methylated picrasane type quassinoids, javanicins E, F, G and M, were isolated from the bark of Indonesian Picrasma javanica (Simaroubaceae). In addition, the known quassinoid, quassin, was also identified. The structures were determined by spectroscopic data and chemical evidence.