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 methyl 1-[N-[2-(2,3-dihydroindol-1-yl)-2-oxoethyl]-N'-methylcarbamimidoyl]-4-methylpyrrolidine-3-carboxylate;hydroiodide into its molecular formula.
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C19H27IN4O3
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