You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [(2S,3S)-2-fluoro-5-(5-fluoro-2-oxo-4-sulfanylidenepyrimidin-1-yl)-3-hydroxyoxolan-2-yl]methyl (2S)-2-amino-3-methylbutanoate into its molecular formula.
user
C14H19F2N3O5S
assistant