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 4-[(4,5-dimethyl-3,6-dioxo-1H-pyridazin-2-yl)methyl]pyridine-2-carboxylic acid is given. What is its corresponding molecular formula?
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C13H13N3O4
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