You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N'-(2,3-dihydro-1-benzofuran-2-ylmethyl)-N-ethyl-3-(methoxymethyl)pyrrolidine-1-carboximidamide;hydroiodide is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H28IN3O2
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