You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5,7-diphenyl-2-[9-(3-phenylphenyl)carbazol-3-yl]-7H-indeno[2,1-b]carbazole;5,11-diphenyl-2-[9-(3-phenylphenyl)carbazol-3-yl]-11H-indeno[1,2-b]carbazole;7,7,12-triphenyl-3-[9-(3-phenylphenyl)carbazol-3-yl]indeno[1,2-a]carbazole The above is the IUPAC name of a molecule. Write its molecular formula.
user
C171H112N6
assistant