You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule ethyl 4-[(2-oxo-1-propylspiro[3H-1,8-naphthyridine-4,4'-piperidine]-1'-yl)methyl]piperidine-1-carboxylate into molecular formula.
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C24H36N4O3
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