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 (Z)-N-(4,6-dimethylpyridin-2-yl)-4-oxo-4-piperidin-1-ylbut-2-enamide is given. What is its corresponding molecular formula?
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C16H21N3O2
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