You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 11-phenyl-12-[4-[4-(7-phenylbenzo[b][1,10]phenanthrolin-2-yl)phenyl]phenyl]indolo[2,3-a]carbazole into its molecular formula.
user
C58H36N4
assistant