kynurenate + AH2 + O2 <=> 7,8-dihydro-7,8-dihydroxykynurenate + A
kynurenate + ah2 + o2 <=> 7,8-dihydro-7,8-dihydroxykynurenate + a
kynurenate + AH2 + O2 <=> 7,8-dihydro-7,8-dihydroxykynurenate + A
kynurenate + ah2 + o2 <=> 7,8-dihydro-7,8-dihydroxykynurenate + a