The molecule is a flavonoid oxoanion arising from deprotonation of the sulfo and 7-hydroxy groups of quercetin 3,3'-bissulfate; major species at pH 7.3. It is a flavonoid oxoanion and an aryl sulfate oxoanion. It is a conjugate base of a quercetin 3,3'-bissulfate.
[5,7-dihydroxy-2-(4-oxido-3-sulfonatooxyphenyl)-4-oxochromen-3-yl] sulfate