The molecule is a nucleotide-sugar oxoanion arising from deprotonation of the carboxy and diphosphate OH groups of UDP-N-acetylmuramic acid; major species at pH 7.3. It is a conjugate base of an UDP-N-acetylmuramic acid.
(2R)-2-[(3R,4R,5S,6R)-3-acetamido-2-[[[(2R,3S,4R,5R)-5-(2,4-dioxopyrimidin-1-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-oxidophosphoryl]oxy-oxidophosphoryl]oxy-5-hydroxy-6-(hydroxymethyl)oxan-4-yl]oxypropanoate