You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named N-[[3-(difluoromethoxy)phenyl]methyl]-4-[3-(trifluoromethyl)phenyl]sulfonylpiperazine-1-carboxamide is given. What is its corresponding molecular formula?
user
C20H20F5N3O4S
assistant