You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[2-[6-(4,6-diphenyl-1,3,5-triazin-2-yl)dibenzofuran-3-yl]phenyl]-9-phenylcarbazole is the IUPAC name of a molecule. Please give its molecular formula.
user
C51H32N4O
assistant