You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[4-cyano-2-(trifluoromethoxy)phenyl]-5-ethoxy-2-methyl-3,4-dihydro-1,6-naphthyridine-3-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H17F3N4O3
assistant