You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[3-[[N-[2-(6-fluoro-1H-indol-3-yl)ethyl]-N'-methylcarbamimidoyl]amino]propyl]thiophene-2-carboxamide;hydroiodide into its molecular formula.
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C20H25FIN5OS
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