You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
9-[3-carbazol-9-yl-5-[4-[2-phenyl-6-(4-phenylphenyl)pyrimidin-4-yl]phenyl]phenyl]carbazole;9-[4-[2-phenyl-6-(4-phenylphenyl)pyridin-4-yl]phenyl]carbazole is the IUPAC name of a molecule. Please give its molecular formula.
user
C99H66N6
assistant