You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-(1-cyclopropyl-4-methylpyrrolidin-3-yl)-3-ethyl-2-[(6-methylpyridin-3-yl)methyl]guanidine;hydroiodide into its molecular formula.
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C18H30IN5
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