You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[4-(difluoromethyl)phenyl]-2-[[methyl(2-methylpropyl)amino]methyl]-7-[3-(trifluoromethyl)pyridin-2-yl]-1,8-naphthyridin-4-amine by IUPAC nomenclature, provide its molecular formula.
user
C27H26F5N5
assistant