You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
11-[6-dibenzofuran-4-yl-2-(3-phenylphenyl)pyrimidin-4-yl]-5-phenylindolo[3,2-b]carbazole is the IUPAC name of a molecule. Please give its molecular formula.
user
C52H32N4O
assistant