You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(4-acetylpiperazin-1-yl)-2-[[5-(4-fluorophenyl)-4-methyl-1,2,4-triazol-3-yl]sulfanyl]ethanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H20FN5O2S
assistant