You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(4-chlorophenyl)-1-[2-(4-ethylphenyl)-2-oxoethyl]-3,4,6,7-tetrahydro-2H-1,7-naphthyridine-4-carboxamide;ethane The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H32ClN3O2
assistant