The molecule is dianion of stipitatic acid arising from deprotonation of the carboxylic acid and 6-hydroxy groups. It is a 5-oxo monocarboxylic acid anion and a hydroxy monocarboxylic acid anion. It is a conjugate base of a stipitatic acid and a stipitatate(1-).
4-carboxy-6-oxocyclohepta-2,4,7-triene-1,2-diolate