The molecule is dianion of UDP-4-amino-UDP-2,4-diacetamido-2,4,6-trideoxy-beta-L-altrose arising from deprotonation of the diphosphate; major species at pH 7.3. It is a conjugate base of an UDP-2,4-diacetamido-2,4,6-trideoxy-beta-L-altrose.
[(2R,3R,4S,5R,6S)-3,5-diacetamido-4-hydroxy-6-methyloxan-2-yl] [[(2R,3S,4R,5R)-5-(2,4-dioxopyrimidin-1-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-oxidophosphoryl] phosphate