You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 1-[[2-[4-(aminomethyl)-2-methylpyrrolidine-1-carbonyl]furan-3-yl]methyl]-3H-indol-2-one;hydrochloride into molecular formula.
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C20H24ClN3O3
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