You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-[1-[2-(1-ethenyl-4-hydroxypiperidin-4-yl)acetyl]piperidin-4-yl]-5-(3-methylbut-1-ynyl)pyridine-2-carboxamide into molecular formula.
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C25H34N4O3
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