5,6-Dimethyl-9-D-ribitylisoalloxazine 5984-80-5 Isoalloxazine, 6,7-dimethyl-10-(D-ribo-2,3,4,5-tetrahydroxypentyl)- (8CI) Isoalloxazine, 6,7-dimethyl-10-D-ribityl- Isoriboflavin Isoriboflavine NSC 3100 Riboflavin, 8-demethyl-6-methyl- (9CI) Riboflavine, 8-demethyl-6-methyl- X 18