ABSTRACT
Objective: To investigate the chemical constituents of Amomum paratsao-ko. Methods: The chemical constituents were separated and purified consecutively by silica gel, Sephadex LH-20 column chromatography, recrystallization as well as preparative HPLC. Their structures were determined by physicochemical properties and spectral analyses. Results: Fourteen compounds were isolated and identified as 2(E)-2-decene-1,10-di-yl-acetate (1), 2(E)-2-decene-1,10-diol (2), β-sitosterol (3), 3,5-dihydroxy- 7,4’-dimethoxyflavone (4), rhamnocitrin (5), kaempferol (6), rhamnetin (7), kaempferol-3,7,4’-O-trimethylether (8), ombuin (9), quercetin (10), kumatakenin (11), octyl ferulate (12), (E)-decyl-3-(4-hydroxy-3-methoxyphenyl) propenoate (13), and trans-p-hydroxycinnamic acid (14). Conclusion: Compound 1 is a new compound named paratsaokoster, and compounds 2-14 are isolated from this plant for the first time.
ABSTRACT
OBJECTIVE: To study the active substances of Acanthopanax sessiliflorus (Rupr. Et Maxim.) Seem for better using the traditional Chinese medicine.
ABSTRACT
Four crystals have been isolated from the whole herbs of Gynostemma entaphyllum (Thurb)Makino(Cucurbitaceae).Their structures were elucidated as Ombuin(Ⅰ), ?-Spinasterol(Ⅱ)and fatty acids(Ⅲ,Ⅳ)on the basis of spectroscopic analysis.