You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
7,7-dimethyl-12-phenyl-3-[9-(3-phenylphenyl)carbazol-3-yl]indeno[1,2-a]carbazole;12,12-dimethyl-11-phenyl-8-[9-(3-phenylphenyl)carbazol-3-yl]indeno[2,1-a]carbazole;12,12-dimethyl-5-phenyl-2-[9-(3-phenylphenyl)carbazol-3-yl]indeno[1,2-c]carbazole The above is the IUPAC name of a molecule. Write its molecular formula.
user
C153H108N6
assistant