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 N-(4-amino-3,4-dioxo-1-pyridin-4-ylbutan-2-yl)-5-methyl-4-pyridin-2-yl-1H-pyrazole-3-carboxamide is given. What is its corresponding molecular formula?
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C19H18N6O3
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