You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (2R)-2-(3,5-dichloro-N-methylsulfonylanilino)-N-(5-prop-2-enylsulfanyl-1,3,4-thiadiazol-2-yl)butanamide by IUPAC nomenclature, provide its molecular formula.
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C16H18Cl2N4O3S3
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