Chromatographic separation of constituents in the EtOH extract of the herb of Rhodiola quadrifida (Pall.) Fisch. & C. A. Mey. (Crassulaceae) isolated 14 compounds including four new flavonol glycosides 1–4. UV and NMR spectroscopy and mass spectrometry found that the compounds were gossypetin and herbacetin derivatives, i.e., gossypetin-8-O-(2″-O-β-D-glucopyranosyl)-β-D-glucuronopyranoside (rhodiquadrin A, 1), gossypetin-3-O-(3″-O-acetyl)-β-D-glucopyranoside-8-O-β-D-glucuronopyranoside (rhodiquadrin B, 2), herbacetin-8-O-(2″-O-β-D-glucopyranosyl)-β-D-glucuronopyranoside (rhodiquadrin C, 3), and gossypetin-8-O-α-L-arabinopyranoside (rhodiquadrin D, 4). A study of the biological activities of the isolated flavonoids showed that the gossypetin derivatives possessed high antiradical and anti-glucosidase activity.

中文翻译：

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来自四裂红景天的新黄酮醇糖苷

色谱分离 Rhodiola quadrifida (Pall.) Fisch 草本植物乙醇提取物中的成分。＆CA 梅。（景天科）分离出 14 种化合物，包括四种新的黄酮醇苷 1-4。紫外和核磁共振光谱和质谱发现该化合物为棉黄素和草本素衍生物，即gossypetin-8-O-(2″-O-β-D-glupyranosyl)-β-D-glucuronopyranoside (rhodiquadrin A, 1)， gossypetin-3-O-(3″-O-acetyl)-β-D-glupyranoside-8-O-β-D-glucuronopyranoside (rhodiquadrin B, 2), herbacetin-8-O-(2″-O-β -D-吡喃葡萄糖基)-β-D-吡喃葡萄糖苷 (rhodiquadrin C, 3) 和 gossypetin-8-O-α-L-arabinopyranoside (rhodiquadrin D, 4)。对分离出的黄酮类化合物的生物活性的研究表明，棉黄素衍生物具有很高的抗自由基和抗葡萄糖苷酶活性。