You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[1-(4-acetylpiperazin-1-yl)-1-oxopropan-2-yl] 3-(4-fluorophenyl)sulfanylpropanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H23FN2O4S
assistant