The molecule is an oxo monocarboxylic acid anion obtained by deprotonation of the carboxy as well as the 5-hydroxy group of nogalonic acid. It is the major microspecies at pH 7.3 (according to Marvin v 6.2.0.). It is an oxo monocarboxylic acid anion and a phenolate anion. It is a conjugate base of a nogalonic acid.
2-[5-hydroxy-4-oxido-9,10-dioxo-3-(3-oxobutanoyl)anthracen-2-yl]acetate