The molecule is an organophosphate oxoanion obtained by deprotonation of the phosphate OH groups of (S)-4-hydroxy-2,3-pentanedione-5-yl phosphate. Major structure at pH 7.3. It is a conjugate base of a (2S)-2-hydroxy-3,4-diketopentyl phosphate.
[(2S)-2-hydroxy-3,4-dioxopentyl] phosphate