You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 2-(4-dimethylphosphorylphenyl)-4-spiro[6,7-dihydroxanthene-9,9'-fluorene]-2-yl-4,4a-dihydro-[1]benzothiolo[3,2-d]pyrimidine is given. What is its corresponding molecular formula?
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C43H33N2O2PS
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