Chemical constituents from the roots of Cassia fistula L.

The chemical constituents in the roots of Cassia fistula L. were investigated with column chromatography. Nineteen compounds including seven anthraquinones, chrysophanol (1), physcion (2), emodin (3), aloe-emodin (4), 11-acetylaloe-emodin (5), rhein (6), citreorosein (7); four flavan-3-ols, (-)-epiafzelechin (8), (+)-afzelechin (9), (-)-epicatechin (10), (+)-catechin (11); three sterols, a mixture of β-sitosterol (12) and stigmasterol (13), β-sitosterol-3-O-β-glucopyanoside (14); one triterpene, lupeol (15); and four glycerides, a mixture of glycerol-1-tetraeicosanoate (16) and glycerol-1-pentaeicosanoate (17), trimyristin (18), and glyceryl trilinolate (19) were determined by spectroscopic analysis.