You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 3-butyl-1-(2-methoxyethyl)-5-nitro-6-(1-phenylpyrazol-4-yl)pyrimidine-2,4-dione by IUPAC nomenclature, provide its molecular formula.
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C20H23N5O5
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