You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-ethyl-3-(3-oxo-1,4-benzoxazin-4-yl)-N-[2-oxo-2-[2-(trifluoromethyl)anilino]ethyl]propanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H22F3N3O4
assistant