You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[3-(4-cyclopentyl-5-methylsulfanyl-1,2,4-triazol-3-yl)propyl]-2,4-difluorobenzamide into its molecular formula.
user
C18H22F2N4OS
assistant