Lipophilic Constituents from the Leaves of Ipomoea batatas(cv.Simon)

Eight compounds:β-amyrin acetate (1),friedelin (2),epifriedelanol (3),n-triacontanol (4),β-sitosterol(5),ethyl caffeate (6),scopoletin(7)and daucosterol (8) were isolated by silica gel chromatography from the leaves of Ipomoea batatas Lam(cv Simon),and their structures were elucidated on the basis of physico-chemical properties and spectral data.Compound 3,4,6,7 and 8 were obtained from this plant for the first time.