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 5-chloro-N-[(2S)-2-(furan-2-yl)-2-pyrrolidin-1-ium-1-ylethyl]-1-benzofuran-2-carboxamide is given. What is its corresponding molecular formula?
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C19H20ClN2O3+
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