The molecule is conjugate base of 7,8-didemethyl-8-hydroxy-5-deazariboflavin arising from deprotonation at the 3-position of the pyrimidoquinoline ring system; major species at pH 7.3. It is a conjugate base of a 7,8-didemethyl-8-hydroxy-5-deazariboflavin.
4,8-dioxo-10-[(2S,3S,4R)-2,3,4,5-tetrahydroxypentyl]-3H-pyrimido[4,5-b]quinolin-2-olate