You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named ethyl 1-[3-[4-(3-bromophenyl)sulfanyl-3-nitrophenyl]prop-2-enoyl]pyrrolidine-3-carboxylate by IUPAC nomenclature, provide its molecular formula.
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C22H21BrN2O5S
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