You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-ethyl-2-[2-(3-methoxyphenyl)ethyl]-1-methyl-1-[(1-methylpyrrol-2-yl)methyl]guanidine;hydroiodide into its molecular formula.
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C19H29IN4O
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