has role is deprotonated form of riboflavin vitamin B2 cofactor riboflavin(1-) 1-deoxy-1-(7,8-dimethyl-2,4-dioxo-2H-benzo[g]pteridin-3-id-10(4H)-yl)-D-ribitol vitamin B2(1-) riboflavin 1-deoxy-1-(7,8-dimethyl-2,4-dioxo-2H-benzo[g]pteridin-3-id-10(4H)-yl)-D-ribitol An organic anion that is the conjugate base of riboflavin resulting from the removal of a proton from the nitrogen at position 3 (between the two carbonyl groups). Major microspecies at pH 7.3. 7,8-dimethyl-2,4-dioxo-10-[(2S,3S,4R)-2,3,4,5-tetrahydroxypentyl]-2H,3H,4H,10H-benzo[g]pteridin-3-ide riboflavin anion flavin(1-) Saccharomyces cerevisiae metabolite