You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2-[1-[N-[2-[(2-fluorophenyl)methylsulfanyl]ethyl]-N'-methylcarbamimidoyl]piperidin-3-yl]acetamide .
user
C18H27FN4OS
assistant