7,8-dimethylbenzo[g]pteridine-2,4(1H,3H)-dioneRiboflavin lumichromelumichrome6,7-Dimethylalloxazine7,8-dimethylisoalloxazine7,8-dimethylalloxazineLUMICHROME7,8-DimethylalloxazineLumichromeLUMICHROMELumichrome7,8-Dimethylalloxazinelumichromelumichrome