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High-resolution Tandem Mass Spectrometry for Studying Chemical Constituents of Gynura bicolor DC
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[Studies on chemical constituents from stems of Cudrania tricuspidata]
Yuzhen Guan1, Zhiqi Yin, Lian Guo
1Department of Phytochemistry, China Pharmaceutical University, Nanjing 210009, China.
Objective:
To study the chemical constituents from the stems of Cudrania tricuspidata.
Method:
The chemical constituents from the ethanol extract of C. tricuspidata were isolated and purified by silica gel, Sephadex LH-20 column chromatographic methods. Their structures were identified on the basis of spectroscopic data and physico-chemical properties.
Result:
Thirteen compounds were isolated and identified as butyrospermyl acetate (1), glutinol (2), taraxerone (3), quercetin (4), kaempferol (5), isorhamnetin (6), orobol (7), 3'-O-methyorobol (8), taxifolin (9), naringenin (10), steppogenin (11), 1,3,6,7-tetrahydroxyx-anthone (12), 5,7-dihydroxy chromone (13).
Conclusion:
Compounds 1-3, 6, 13 were isolated from this genus for the first time, while compound 12 was isolated from this plant for the first time and we firstly reported the terpenoids from the genus Cudrania.
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