7-hydroxy-6-methyl-8-(1-D-ribityl)lumazine(1-)
7-hydroxy-6-methyl-8-(1-d-ribityl)lumazine(1-)
The conjugate base of 7-hydroxy-6-methyl-8-(1-<small>D</small>-ribityl)lumazine arising from deprotonation of the 7-hydroxy group; major species at pH 7.3.