从引种的巴西甘薯IpomoeabatatasLam.叶中分到8个化合物和1个氨基酸混合物，其中7个经光谱分析和化学反应等方法分别鉴别为：槲应甙（quercetin-3-glucoside,Ⅰ）、山柰素-4＇7-二甲醚（kaempferol-4’，7-dimethylether，Ⅱ）、商陆黄素（ombuin，Ⅲ）、槲皮素（Ⅳ）、槲皮素-3＇，4＇，7-三甲醚（quercetin-3＇，4＇，7-trimethyletherⅤ）、β-谷甾醇（Ⅵ）和蔗糖（Ⅶ）。上述成分均首次从该植物中分得。

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), β-sitosterol (Ⅵ) and sucrose (Ⅶ).All of them were isolated from this plant for the first time.