You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 6-(2,4-dimethylphenyl)-4,7,8-trimethyl-2-(3-oxobutan-2-yl)purino[7,8-a]imidazole-1,3-dione into molecular formula.
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C22H25N5O3
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