You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named N-[4-(2-amino-2-oxoethoxy)phenyl]-2-cyclopropyl-4,5-dimethylthieno[2,3-d]pyrimidine-6-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C20H20N4O3S
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