The molecule is a hydroxy monocarboxylic acid anion that is the conjugate base of 2-(3,4-dihydroxybenzoyloxy)-4,6-dihydroxybenzoic acid. It is a conjugate base of a 2-(3,4-dihydroxybenzoyloxy)-4,6-dihydroxybenzoic acid.
4-(2-carboxy-3,5-dihydroxyphenoxy)carbonyl-2-hydroxyphenolate