作者:Guido Rath、Olivier Potterat、Stephen Mavi、Kurt Hostettmann
DOI:10.1016/0031-9422(96)00284-1
日期:1996.9
Four new xanthones have been isolated from the roots of Hypericum roeperanum. Their structures have been established by a combination of spectroscopic and chemical methods as 1,6-dihydroxy-5-methoxy-4',5'-dihydro-4',4',5'-trimethylfurano- (2',3':3,4)-xanthone (5-O-methyl-2-deprenylrheediaxanthone B), 1,6-dihydroxy-5-methoxy-6',6'-dimethylpyrano-(2',3':3,4)-xanthone (5-O-methylisojacareubin), 1,3,5
从金丝桃的根中分离出四种新的氧杂蒽酮。它们的结构已通过光谱和化学方法的组合确定为 1,6-dihydroxy-5-methoxy-4',5'-dihydro-4',4',5'-trimethylfurano-(2',3': 3,4)-xanthone (5-O-methyl-2-deprenylrheediaxanthone B), 1,6-dihydroxy-5-methoxy-6',6'-dimethylpyrano-(2',3':3,4)-xanthone (5-O-methylisojacareubin), 1,3,5,6-tetrahydroxy-2-(2',2'-dimethyl-4'-isopropenyl)-cycloopen tanylxanthone (5-O-demethylpaxanthonin) 和 1,3,5 ,6-tetrahydroxy-4-trans-se