The molecule is a 4-thiouridin 5'-monophosphate that results from the removal of two protons from the phosphate group; major species at pH 7.3.
[(2R,3S,4R,5R)-3,4-dihydroxy-5-(2-oxo-4-sulfanylidenepyrimidin-1-yl)oxolan-2-yl]methyl phosphate