You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 1-[2-(4-chlorophenyl)ethyl]-3-(3,4-dimethylphenyl)-4-phenylsulfanylpyrrole-2,5-dione by IUPAC nomenclature, provide its molecular formula.
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C26H22ClNO2S
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