The molecule is an oxo monocarboxylic acid anion that is the monoanion obtained by the deprotonation of the carboxy group of aklanonic acid. It is a conjugate base of an aklanonic acid. It is a conjugate acid of an aklanonate(2-).
2-[4,5-dihydroxy-9,10-dioxo-3-(3-oxopentanoyl)anthracen-2-yl]acetate