You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 4-[cyano(pyridin-3-yl)methyl]-N-ethyl-N-[(4S)-2-methyl-5-oxoheptan-4-yl]piperidine-1-carboxamide into molecular formula.
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C23H34N4O2
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