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Under IUPAC nomenclature, a molecule named 3,5-dimethyl-N-[2-(2-methyl-6-oxo-1H-pyrimidin-4-yl)ethyl]-4-oxothieno[2,3-d]pyrimidine-6-carboxamide is given. What is its corresponding molecular formula?
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C16H17N5O3S
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