Related Experiment Videos
[A new flavonoid glycoside from Allium cepa L. var agrogatum Don]
1Department of Medicinal Chemistry, College of Pharmaceutical Science, Norman Bethune University of Medical Sciences, Changchun 130021, China. yang.xh.cc.jl.cn@263.net
Aim:
To investigate the chemical constituents from the bulb stems of the Chinese medicinal plant Allium cepa L. var. agrogatum Don.
Methods:
The crude extracts of the bulb stem were purified by Sephadex LH-20 chromatography. IR, UV, MS, 1H, 13CNMR, 1H-1H COSY, 1H-13C COSY and HMBC spectra were used to determine the structure of the isolated constituents.
Results:
A new compound named quercetin 3'-methoxy-4'-O-beta-D-glucopyranoside(I), together with three known compounds kaempferol(II), quercetin 4'-O-beta-D-glucopyranoside(III) and quercetin 3,4'-di-O-beta-D-glucopyranoside(IV) were isolated.
Conclusion:
Quercetin 3'-methoxy-4'-O-beta-D-glucopyranoside(I) is a new compound, compounds II-IV were isolated from this plant for the first time.