POLYOXYGENATED FLAVONES FROM AGERATUM CONYZOIDES

Article abstract of DOI:10.1016/S0031-9422(00)84523-9

Key Word Index - Ageratum conyzoides; Asteraceae; 5,6,7-trimethoxy-3',4'-methylenedioxyflavone; 5,6,7,3'-tetramethoxy-4'-hydroxyflavone; 5,6,7,3',5'-pentamethoxy-4'-hydroxyflavone; polyoxygenated flavones.Twelve polyoxygenated flavones have been isolated from Ageratum conyzoides, three of which are new natural flavones, namely ageconyflavones A (5,6,7-trimethoxy-3',4'-methylenedioxyflavone), B (5,6,7,3'-tetramethoxy-4'-hydroxyflavone) and C (5,6,7,3',5'-pentamethoxy-4'-hydroxyflavone).The other nine compounds were identified as linderoflavone B, eupalestin, nobiletin, 5'-methoxynobiletin, 5,6,7,5'-tetramethoxy-3',4'-methylenedioxyflavone, sinensetin, 5,6,7,3',4',5'-hexamethoxyflavone, 5,6,7,8,3'-pentamethoxy-4'-hydroxyflavone and 5,6,7,8,3',5'-hexamethoxy-4'-hydroxyflavone.