You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 2,4-dichloro-1-[(E)-1-[(E)-1-(2,4-dichlorophenyl)-3-(3-nitrophenyl)prop-2-enyl]sulfonyl-3-(3-nitrophenyl)prop-2-enyl]benzene by IUPAC nomenclature, provide its molecular formula.
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C30H20Cl4N2O6S
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