The molecule is a phenolate anion resulting from the removal of a proton from the phenolic hydroxy group at position 5 of methyl nogalonate. The major species at pH 7.3. It is a conjugate base of a methyl nogalonate.
8-hydroxy-3-(2-methoxy-2-oxoethyl)-9,10-dioxo-2-(3-oxobutanoyl)anthracen-1-olate