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 methyl 2-[(4-amino-1,3-dimethyl-2,6-dioxopyrimidin-5-yl)methylideneamino]-3-methylbutanoate is given. What is its corresponding molecular formula?
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C13H20N4O4
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