2184-54-5 6-Methyl-7-hydroxyribolumazine 7-Hydroxy-6-methyl-8-(1-D-ribityl)lumazine D-Ribitol, 1-deoxy-1-(3,4-dihydro-7-hydroxy-6-methyl-2,4-dioxo-8(2H)-pteridinyl)- Masuda's compound V