You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 5-(2-amino-2-oxoethyl)-3-[1-ethyl-3-methyl-4-(oxan-4-ylamino)pyrazolo[3,4-b]pyridin-5-yl]-2H-1,2-oxazole-5-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C20H27N7O4
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