You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[2,6-diphenyl-4-(12-phenylindolo[3,2-c]carbazol-5-yl)phenyl]benzene-1,3-dicarbonitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C50H30N4
assistant