The molecule is a flavonoid oxoanion arising from deprotonation of the 7-hydroxy and sufo groups of quercetin 3-sulfate; 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-sulfate.
[5,7-dihydroxy-2-(3-hydroxy-4-oxidophenyl)-4-oxochromen-3-yl] sulfate