101652-10-2 7,8-Dimethyl-10-(D-ribo-2,3,4,5-tetrahydroxypentyl)-4a,5-dihydroisoalloxazine Isoalloxazine, 4a,5-dihydro-7,8-dimethyl-10-(D-ribo-2,3,4,5-tetrahydroxypentyl)- RIBOFLAVINE, 4a,5-DIHYDRO-