ABSTRACT
OBJECTIVE: To investigate the liposoluble constituents from the herb of Pothos chinensis (Raf.) Merr. of Araceae. METHODS: The compounds were isolated and purified by silica gel, Sephadex LH -20, semi-preparative HPLC and recrystallization methods. Their structures were identified on the basis of spectral analysis, physicochemical characteristics and comparison of their spectral data with those in the literature. RESULTS: Seventeen compounds were isolated and identified respectively as honokiol(1), hinokinin(2), racemosol(3), 24-propylcholest-7-en-3-ol(4), β-sitosterol(5), daucosterol (6), hentriacontane(7), palmitic acid (8), oleic acid(9), linoleic acid(10), 9, 12, 15-ocatadecatrienoic acid(11), 13-phenyltridecanoic acid(12), 13-(3', 4'-methyl -enedioxyphenyl)-tridecanoic acid(13), 1-monostearin(14), 1-monopalmitin(15), benzoic acid(16), and vanillic acid(17). CONCLUSION: Compounds 1-16 are isolated for the first time from this plant.
ABSTRACT
The triterpenoids of Dichrocephala benthamii were investigated by means of silica gel, Sephadex LH-20 and semi-preparative HPLC. Nine triterpenoids were isolated from D. benthamii. By analysis of the EI-MS, NMR spectra and comparison to the data reported in literatures, the structures of these compounds were determined as β-amyrin formiate (1), β-amyrin acetate (2), β-amyrenol (3), β-amyrone (4), 3β-hydroxy-olean-11, 13 (18)-diene (5) , Δ12-oleanene (6) , friedelin (7), dammaradienyl acetate (8), epi-friedeband (9), respectively. Compounds 1-8 were isolated for the first time form this genus, compound 9 was isolated for the first time from this plant, whereas β-amyrin formiate (1) was a new natural product.