The molecule is a nucleotide-sugar oxoanion arising from deprotonation of the carboxylic acid and phosphate functions of CMP-3-deoxy-beta-D-manno-octulosonic acid; major species at pH 7.3. It is a conjugate base of a CMP-3-deoxy-beta-D-manno-octulosonic acid.
(2R,4R,5R,6R)-2-[[(2R,3S,4R,5R)-5-(4-amino-2-oxopyrimidin-1-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-oxidophosphoryl]oxy-6-[(1R)-1,2-dihydroxyethyl]-4,5-dihydroxyoxane-2-carboxylate