You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-oxo-2-[4-[3-(trifluoromethyl)phenyl]piperazin-1-yl]ethyl]-N-(4-phenoxyphenyl)benzenesulfonamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C31H28F3N3O4S
assistant