further in vivo studies showed that a single topical application of tannic acid , quercetin , and myricetin greatly diminished epidermal ahh ( 53-65 % ) , ethoxycoumarin o-deethylase ( 30-68 % ) , and ethoxyresorufin o-deethylase ( 66-97 % ) activities whereas anthraflavic acid was ineffective in this regard even when repeatedly applied .
C0003927
ahh
C0000644
ethoxycoumarin o-deethylase