You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named N-ethyl-3-(2-methylpropyl)-N'-[2-(2,3,4-trimethoxyphenyl)ethyl]pyrrolidine-1-carboximidamide by IUPAC nomenclature, provide its molecular formula.
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C22H37N3O3
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