You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 3-methyl-N'-[3-(4-methyl-2-phenylpiperazin-1-yl)propyl]piperidine-1-carboximidamide;hydroiodide is given. What is its corresponding molecular formula?
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C21H36IN5
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