The molecule is conjugate base of xanthommatin having both carboxy groups deprotonated and the amino group protonated; major species at pH 7.3. It is a conjugate base of a xanthommatin.
11-(3-azaniumyl-3-carboxylatopropanoyl)-1,5-dioxo-4H-pyrido[3,2-a]phenoxazine-3-carboxylate