You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[4-[(Z)-2-amino-2-[4-[(Z)-2-amino-2-[4-(4-methyl-N-(4-methylphenyl)anilino)phenyl]ethenyl]phenyl]ethenyl]phenyl]-4-methyl-N-(4-methylphenyl)aniline by IUPAC nomenclature, provide its molecular formula.
user
C50H46N4
assistant