You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-(4-ethylphenyl)phenyl]-3-methoxy-N-methyl-1,6-naphthyridine-4-carboxamide;formaldehyde The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H25N3O3
assistant