The molecule is a fluorocyclopentenylcytosine 5'-monophosphate that results from the removal of two protons from the phosphate group; major species at pH 7.3.
[(4S,5R)-3-(4-amino-2-oxopyrimidin-1-yl)-2-fluoro-4,5-dihydroxycyclopenten-1-yl]methyl phosphate