You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 9-(9,9-dimethylfluoren-2-yl)-3-(9-phenylcarbazol-3-yl)-6-(4-phenylphenyl)carbazole;3-(9-phenylcarbazol-3-yl)-6,9-bis(4-phenylphenyl)carbazole;3-phenyl-6-(9-phenylcarbazol-3-yl)-9-(4-phenylphenyl)carbazole by IUPAC nomenclature, provide its molecular formula.
user
C159H108N6
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