You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(2-methylphenyl)methyl]-5-[5-methyl-2-(trifluoromethyl)benzimidazol-1-yl]-6,7-dihydro-5H-1,4-diazepin-2-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H22F3N5
assistant