[Study on the chemical constituents of the leaves of Ipomoea batatas].

OBJECTIVE: To study the chemical constituents of the leaves of Ipomoea batatas. METHODS: The constituents were isolated and purified by silica gel and TLC, and their structures were elucidated by spectroscopy. RESULTS: Six compounds were isolated from 90% ethanol extract and identified as tetracosane (I ), myristic acid (II), beta-sitosterol (II), beta-carotene (IV), daucosterol (V) and quercetin (VI). CONCLUSION: Compounds I, II, IV, V are isolated from this plant for the first time.