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 2-[1-[N'-methyl-N-[2-methyl-2-(1-phenylethylamino)propyl]carbamimidoyl]piperidin-3-yl]acetamide is given. What is its corresponding molecular formula?
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C21H35N5O
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