[Study on flavonoids from leaf of Ipomoea batatas].
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.
Luo
Jian-guang
JG
Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 210038, China.
Kong
Ling-yi
LY
D001578:Benzopyrans / Q000737:chemistry / Q000302:isolation & purification*; D005419:Flavonoids; D027723:Ipomoea batatas / Q000737:chemistry*; D044949:Kaempferols / Q000737:chemistry / Q000302:isolation & purification*; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D011794:Quercetin / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification
D001578:Benzopyrans; D005419:Flavonoids; D044949:Kaempferols; C052083:tiliroside; C063423:rhamnetin; D011794:Quercetin; C001579:astragalin