[Chemical constituents of ethyl acetate fraction of Tetrastigma planicaule].

OBJECTIVE: To investigate the chemical constituents of ethyl acetate of Tetrastigma planicaule. METHODS: The ethyl acetate fraction was isolated and purified by repeated silica gel chromatography and recrystallization. The structures of compounds were identified by physical-chemical methods and spectral data such as MS, 1H-NMR, 13C-NMR, etc. RESULTS: Six compounds were identified as gheddic acid (I), tricosanol (II), beta-sitosterol (III), palmitic acid (IV), ethyl gallate (V) and vanillin (VI), respectively. CONCLUSION: Compounds I, II, V and VI are isolated from this plant for the first time.