You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule ethyl 4-[N-ethyl-N'-[2-(2-methoxyphenyl)propyl]carbamimidoyl]piperazine-1-carboxylate;hydroiodide into molecular formula.
user
C20H33IN4O3
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