The molecule is a UDP-L-rhamnose(2-) in which the rhamnose portion has beta-configuration at its anomeric centre; the major form of UDP-beta-L-rhamnose at pH 7.3.
[[(2R,3S,4R,5R)-5-(2,4-dioxopyrimidin-1-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-oxidophosphoryl] [(2R,3R,4R,5R,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl] phosphate