The molecule is a nucleotide-sugar oxoanion arising from deprotonation of the phosphate OH groups of UDP-rhamnose. It is a conjugate acid of an UDP-rhamnose.
[[(2R,3S,4R,5R)-5-(2,4-dioxopyrimidin-1-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-oxidophosphoryl] (3,4,5-trihydroxy-6-methyloxan-2-yl) phosphate