You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Translate the chemical IUPAC name N'-[(1-cyclopropylpyrrolidin-3-yl)methyl]-N-ethyl-2-oxa-7-azaspiro[4.4]nonane-7-carboximidamide;hydroiodide into its molecular formula.
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C18H33IN4O
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