You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 13-[3-dibenzothiophen-4-yl-5-(9,9-dimethylfluoren-2-yl)phenyl]-7,7-dimethylchromeno[2,3-a]carbazole into its molecular formula.
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C54H39NOS
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