The molecule is a flavonoid oxoanion arising from deprotonation of the sulfate and 7-hydroxy groups of quercetin 3,4'-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 3,4'-bissulfate.
[2-hydroxy-4-(7-hydroxy-5-oxido-4-oxo-3-sulfonatooxychromen-2-yl)phenyl] sulfate