You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[2-fluoro-N-methyl-6-[methyl-[(2S)-1-[6-methyl-4-(trifluoromethyl)pyridin-2-yl]-5-oxopyrrolidine-2-carbonyl]amino]anilino]acetic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H22F4N4O4
assistant