You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[4-(difluoromethoxy)-3-methoxyphenyl]-2-[4-(1-methylpyrazol-4-yl)sulfonylpiperazin-1-yl]acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H23F2N5O5S
assistant