[Research on chemical constituents from stem of Gymnema sylvestre].
Từ khóa
trừu tượng
OBJECTIVE
To study on the chemical constituents from the stem of Gymnema sylvestre.
METHODS
The constituents were extracted by percolation with ethanol. Then the extract was separated by systemic solvent separation methods. The part of n-butanol extract was isolated and purified by macroporous adsorptive resins, silica gel column chromatography, sephadex gel column chromatography and recrystallization. The isolated compounds were identified by spectrum methods.
RESULTS
Eight compounds were isolated and identified as fallows: Conduritol A(I), 1-Heptadecanol(II), Stigmasterol glucoside(III), 1-Quercitol(IV), 1-Octadecanol(V), Potassium nitrate(VI), Lupeol cinnamate(VII), Stigmasterol(VIII).
CONCLUSIONS
Chemical compounds II, III, V, VII are firstly obtained from this plant.
