2',4,4',6'-tetrahydroxychalcone 4'-O-beta-D-glucoside + O2 = aureusidin 6-O-beta-glucoside + H2O
2',4,4',6'-tetrahydroxychalcone 4'-o-beta-d-glucoside + o2 = aureusidin 6-o-beta-glucoside + h2o
2',4,4',6'-tetrahydroxychalcone 4'-O-beta-D-glucoside + O2 = aureusidin 6-O-beta-glucoside + H2O
2',4,4',6'-tetrahydroxychalcone 4'-o-beta-d-glucoside + o2 = aureusidin 6-o-beta-glucoside + h2o