You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-(9-dibenzothiophen-4-yl-1,4b,8a,9a-tetrahydrocarbazol-3-yl)-9-(9,9-dimethylfluoren-1-yl)carbazole into its molecular formula.
user
C51H38N2S
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