The molecule is a hydroxy monocarboxylic acid anion obtained by deprotonation of the carboxy and one of the ortho-phenolic groups of demethylsulochrin. It is the major microspecies at pH 7.3 (according to Marvin v 6.2.0.). It is a hydroxy monocarboxylic acid anion and a phenolate anion. It is a conjugate base of a demethylsulochrin(1-).
2-(2-carboxy-4-hydroxy-6-methoxybenzoyl)-5-methylbenzene-1,3-diolate