You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-[6-[(3,3-dimethyl-2H-1-benzofuran-4-yl)oxy]-5-methylpyridin-3-yl]-2-methyl-4H-imidazol-5-one into its molecular formula.
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C20H21N3O3
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