[Chemical constituents of Notopterygium incisium Ting. III: Chemical constituents isolated and identified from petroleum ether extracts of N. incisium Ting].

Six chemical compounds were isolated from the roots and rhizoma of Notopterygium incisium by column chromatography and preparative thin-layer chromatography, and identified by chemical and spectroscopic analysis as beta-sitosterol, oleic acid, linoleic acid, columbianetin, pregnenolone and ferulic acid. The presence of pregnenolone in the genus Notopterygium has not been reported.