Occurrence of flavonol sulphates in Alchornea laxiflora

TY - JOUR

T1 - Occurrence of flavonol sulphates in Alchornea laxiflora

AU - Ogundipe, O O

AU - Moody, J O

AU - Houghton, P J

PY - 2001

Y1 - 2001

N2 - For the first time, quercetin-3',4'-disulphate(1) and another novel flavonol sulphate quercetin-7,4'-disulphate(2) were isolated from an ethyl acetate-soluble fraction of the crude methanol extract of Alchornea laxiflora. Purification of these compounds was carried out by column chromatography utilising Sephadex LH 20 with 30% toluene in ethanol as eluent. Structural elucidation was by UV, IR, H-1-NMR and C-13-NMR spectroscopy as well as by FAB-MS.

AB - For the first time, quercetin-3',4'-disulphate(1) and another novel flavonol sulphate quercetin-7,4'-disulphate(2) were isolated from an ethyl acetate-soluble fraction of the crude methanol extract of Alchornea laxiflora. Purification of these compounds was carried out by column chromatography utilising Sephadex LH 20 with 30% toluene in ethanol as eluent. Structural elucidation was by UV, IR, H-1-NMR and C-13-NMR spectroscopy as well as by FAB-MS.

UR - http://www.scopus.com/inward/record.url?scp=0035727632&partnerID=8YFLogxK

U2 - 10.1076/phbi.39.6.421.5888

DO - 10.1076/phbi.39.6.421.5888

M3 - Article

VL - 39

SP - 421

EP - 423

JO - PHARMACEUTICAL BIOLOGY

JF - PHARMACEUTICAL BIOLOGY

IS - 6

ER -