You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 1-[2-(furan-2-yl)ethyl]-2-[[3-(2-hydroxyethyl)oxolan-3-yl]methyl]-3-(oxan-2-ylmethyl)guanidine;hydroiodide into molecular formula.
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C20H34IN3O4
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