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-[3-[[2-(4-methoxyphenyl)-2-piperidin-1-ylethyl]amino]-3-oxopropyl]naphthalene-2-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C28H33N3O3
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