Studies on the Chemical Constituents of Leaves of Sweet potato(Ipomoea batatas) Introduced from Brazil / 中草药

ABSTRACT

Seven compounds were isolated from the alcohol extract of leaves of Ipomoea batafas Lam,by column chromatography on silica gel. They were identified by physical and chemical methods as quercetin-3-glucoside (Ⅰ), kaempferol-4＇, 7-dimethyl ether(Ⅱ), ombuin (Ⅲ),quercetin (Ⅳ), quercetin-3＇, 4＇, 7-trimethyl ether(Ⅴ), ?-sitosterol (Ⅵ) and sucrose (Ⅶ).All of them were isolated from this plant for the first time.