| 摘要 |
NEW MATERIAL:A compound of formula I (R<5>, R<6>, R<7> are H, methyl, galloyl group of formula II), formula III (G is galloyl group), formula IV (R<11>, R<12>, R13, R<14> are H, galloyl group; R<10> is H, OH) and formula V (R<20>, R<21> are H, methyl). EXAMPLE:1,2,3-Tri-O-galloylglucose. USE:Metabolism regulator. PREPARATION:For example, seeds of HISHI (Trapa japonica Flerov.) is extracted with aqueous acetone, afte actone is distilled off, the remaining aqueous solution is extracted with ethyl acetate about 10 times to collect the ethyl acetate extract, which is subjected to column chromatography filled with Sephadex LH-20 with solvents of ethanol and 80% aqueous methanol to give galloylglucose of formula I . |
