巴西甘薯叶成分研究

Study on Chemical Constituents of Ipomoea batatas Lam.(cv. Simon)

目的研究巴西甘薯叶的化学成分。方法巴西甘薯叶乙醇提取物经石油醚、醋酸乙酯、正丁醇萃取后，醋酸乙酯萃取部位用硅胶柱色谱，Sephadex LH-20凝胶柱色谱等方法，分得8个化合物，经理化性质和波谱数据鉴定结构。结果从巴西甘薯叶中分离鉴定了8个化合物，被鉴定为①银椴苷；②紫云英苷；③鼠李柠檬素；④鼠李素；⑤山柰酚；⑥咖啡酸十八烷酯；⑦槲皮素-3-O-β—D葡萄糖；⑧2，4-二羟基苯丙烯酸。结论化合物⑥～⑧为首次从该植物中分离得到。

Objective To investigate the chemical constituents of lpomoea batatas Lam. （cv. Simon）. Methods Silica gel column chromatography and Sepbadex LH -20 were used to separate and purify the compounds from the EtOAC soluble fraction of ethanol extract. The chemical structures were elucidated on the basis of physic - chemical properties and spectral data. Results Eight compounds were isolated and identified as （1）tiliroside, （2）astragalin, （3）rhamnocitrin,（4）rhamnetin, （5）kaempferol, （6）octadecyl caffeate,（7）quercetin - 3 - O - β - D - glucoside, （8）2,4 - dihydroxy - cinnamic acid. Conclusion Compounds （6） - （8） were isolated for the first time from this plant.