You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
12-[4-(9,9-dimethylfluoren-3-yl)-6-phenyl-1,3,5-triazin-2-yl]-11-[3-(3-phenylphenyl)phenyl]indolo[2,3-a]carbazole is the IUPAC name of a molecule. Please give its molecular formula.
user
C60H41N5
assistant