You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 1-[(5-ethoxy-2-methyl-2,3-dihydro-1-benzofuran-6-yl)methyl]-2-methyl-3-(4-pyrrolidin-1-ylbutyl)guanidine is given. What is its corresponding molecular formula?
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C22H36N4O2
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