You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule methyl 1-[N'-[2-(3-acetamidophenoxy)ethyl]-N-ethylcarbamimidoyl]piperidine-4-carboxylate;hydroiodide into molecular formula.
user
C20H31IN4O4
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