You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule N-[4-(difluoromethoxy)phenyl]-2-[(4-ethyl-5-thiophen-2-yl-1,2,4-triazol-3-yl)sulfanyl]propanamide ?
user
C18H18F2N4O2S2
assistant