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 N-[(E)-(2,3-dichlorophenyl)methylideneamino]-3-pyrrolidin-1-ylsulfonylbenzamide is given. What is its corresponding molecular formula?
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C18H17Cl2N3O3S
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