the two most mutagenic falvonols , namely , quercetin ( 3,3',4',5,7-pentahydroxyflavone ) and kaempferol ( 3,4',5,7-tetrahydroxyflavone ) , exhibiting 12 and 7 revertants/nmol in ta98 respectively , are also the most common flavonols occurring in plants .
C0034392
quercetin
C0060444
flavonols