Zhongguo Zhongyao Zazhi 2005-Apr
[Study on flavonoids from leaf of Ipomoea batatas].
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OBJECTIVE
To investigate the flavonoid constituents of Ipomoea batatas.
METHODS
The leaf was extracted with EtOH and partitioned with CHCl3, EtOAc and n-BuOH respectively. The chemical components of EtOAc fraction were isolated by silica gel and sephadex LH-20 column chromatography. The chemical structures were elucidated on the basis of physic-chemical properties and spectral data.
RESULTS
Five compounds were isolated and identified as: tiliroside (I), astragalin (II), rhamnocitrin (III), rhamnetin (IV) and kaempferol (V).
CONCLUSIONS
All of these five compounds were obtained from this plant for the first time.
