Chemical constituents from Bidens bipinnata

Objective To study the chemical constituents from the herbs of Bidens bipinnata. Methods The compounds were isolated and purified by various column chromatographies. Their structures were elucidated by means of physicochemical properties and spectral analyses(MS,1H-NMR, and13C-NMR). Results Eighteen compounds were isolated from 95% ethanol extract of B. bipinnata and identified as quercetin-5-O-β-D-glucopyranoside(1), okanin-4′-O-β-D-(2″, 4″, 6″-triacetyl)-glucopyranoside(2), okanin-4′-O-β-D-(3″, 4″-diacetyl-6″-trans-p-coumaroyl)-glucopyranoside(3), luteolin-7-O-β-D-glucopyranoside(4), kaempferol7-O-β-D-glucopyranoside(5), kaempferol-3-O-β-D-rutinoside(6), quercetin-3-O-β-D-glucopyranoside(7), quercetin-7-O-β-Dglucopyranoside(8), hyperoside(9), rutin(10), naringenin(11), apigenin(12), quercetin(13), 5, 7-dihydroxy chromone-7-Oβ-D-glucoside(14), caffeic acid(15), gallic acid(16), β-sitosterol(17), and sitosterol-3-O-glucopyranoside(18). Conclusion Compounds 1 and 11 are obtained from the plants in Bidens L. for the first time, and compounds 3—7, 14, 15, and 18 are firstly obtained from this plant.