You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-ethyl-1-methylsulfonyl-N-[2-oxo-2-[2-(trifluoromethyl)anilino]ethyl]pyrrolidine-2-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H22F3N3O4S
assistant