You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-ethyl-2-[(4-methylphenyl)methyl]-3-[1-(1,3,5-trimethylpyrazol-4-yl)propan-2-yl]guanidine;hydroiodide is the IUPAC name of a molecule. Please give its molecular formula.
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C20H32IN5
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