You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(4S)-3-ethynyl-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]-5-fluoropyrimidine-2,4-dithione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C11H11FN2O4S2
assistant