You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (E)-3-[2-(difluoromethoxy)phenyl]-N-[(4-methyl-5-sulfanylidene-1H-1,2,4-triazol-3-yl)methyl]but-2-enamide into its molecular formula.
user
C15H16F2N4O2S
assistant