You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name methyl N-[4-[[[N'-methyl-N-[(3-methyl-1-benzofuran-2-yl)methyl]carbamimidoyl]amino]methyl]phenyl]carbamate;hydroiodide into its molecular formula.
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C21H25IN4O3
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