ANTHRAQUINONE AND STILBENE DERIVATIVES FROM THE CULTIVATED KOREAN RHUBARB RHIZOMES

The studies were carried out to evaluate the constituents in the rhizomes of the cultivated Korean Rhubarb (Polygonaceae). From the acetone fraction of methanol extract Compound I (1,8-dihydroxy-3-methyI anthraquinone, chrysophanic acid), Compound II (chrysophanol-8-O-beta-D-glucopyranoside), Compound III (emodin-8-O-beta-D-glucopyranoside) and Compound IV (aloe -emodin-8-O-beta-D-glucopyranoside), and from the ether fraction Compound V (1,8-dihydroxy-3-methyl-6-methoxy anthraquinone, physcion) and Compound VI (1,6,8-trihydroxy-3-methyl anthraquinone, emodin), and also from the n-buthanol fraction Compound VII (rhapontigenin-3-O-beta-D-glucopyranoside, rhaponticin) and Compound VIII (piceatannol-3'-O-beta-D-glucopyranoside), were isolated and identified on the basis of their physico-chemical and spectroscopic evidences (UV, IR, H-1-NMR, C-13-NMR, EI-MS), respectively.