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 3-[[1-(2,5-dimethylphenyl)-6-oxo-4,5-dihydropyridazine-3-carbonyl]-methylamino]-2-methylpropanoic acid is given. What is its corresponding molecular formula?
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C18H23N3O4
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