You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-methyl-6-(3-methylphenyl)-2-oxo-N-[[2-(trifluoromethoxy)phenyl]methyl]-1H-pyridine-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H19F3N2O3
assistant