You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance N-methyl-N-[4-[3-[9-[4-(N-methylanilino)phenyl]carbazol-3-yl]carbazol-9-yl]phenyl]naphthalen-1-amine .
user
C54H40N4
assistant