You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 1-[2-(2,3-dihydro-1-benzofuran-5-yl)ethyl]-2-methyl-3-[1-(1-methylpyrazol-4-yl)piperidin-3-yl]guanidine;hydroiodide by IUPAC nomenclature, provide its molecular formula.
user
C21H31IN6O
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