[Studies on chemical constituents from Grewia biloba].

OBJECTIVE: To investigate the chemical constituents of Grewia biloba and find its bioactive compounds. METHODS: Compounds were isolated by silica gel, MCI, Sephadex LH-20 and Rp-18 column chromatography, and purified by recrystallization. Their structures were elucidated by spectral analysis and other methods. RESULTS: Six compounds were isolated and identified as friedelin (1) epi-friedelan-3-ol (2), heneicosanoic acid (3), beta-sitosterol (4), Propyl palmitate (5), eatechin (6), respectively. CONCLUSION: Compounds 1-3, 5, 6 are isolated from Grewia genus for the first time and compounds 4 is isolated from Grewia biloba for the first time.