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-ethyl-3-[4-[methyl(propan-2-yl)amino]butyl]-2-[[5-oxo-1-(2-phenylethyl)pyrrolidin-3-yl]methyl]guanidine is given. What is its corresponding molecular formula?
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C24H41N5O
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