You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-dibenzofuran-4-yl-9-phenyl-6-[4-(9-phenylcarbazol-3-yl)phenyl]carbazole;2-dibenzothiophen-4-yl-9-phenyl-6-[4-(9-phenylcarbazol-3-yl)phenyl]carbazole is the IUPAC name of a molecule. Please give its molecular formula.
user
C108H68N4OS
assistant