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-5-(diethylsulfamoyl)-N-[(2-ethylpyrazol-3-yl)methyl]-N-methylbenzamide by IUPAC nomenclature, provide its molecular formula.
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C18H24Cl2N4O3S
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