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system
Provide the molecular formula for the IUPAC named substance (2R)-4-[2-(5,6-dimethyl-4-oxothieno[2,3-d]pyrimidin-3-yl)acetyl]-N-propyl-2,3-dihydro-1,4-benzoxazine-2-carboxamide .
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C22H24N4O4S
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