You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 2-[(3-chlorophenyl)methyl]-1-ethyl-3-[(1-ethylpyrrolidin-3-yl)methyl]guanidine;hydroiodide by IUPAC nomenclature, provide its molecular formula.
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C17H28ClIN4
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