You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Translate the chemical IUPAC name 2-[3-[[[N-[1-(3-chlorophenyl)pyrrolidin-3-yl]-N'-methylcarbamimidoyl]amino]methyl]phenoxy]acetamide;hydroiodide into its molecular formula.
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C21H27ClIN5O2
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