You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-(4-chlorophenyl)sulfonyl-N-(3,6-dimethyl-1,3-benzothiazol-2-ylidene)pyrrolidine-2-carboxamide into its molecular formula.
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C20H20ClN3O3S2
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