You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 4-[[2-(4-cyanoanilino)-5-oxo-7,8-dihydro-6H-thiopyrano[3,2-d]pyrimidin-4-yl]oxy]-3,5-dimethylbenzonitrile is given. What is its corresponding molecular formula?
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C23H19N5O2S
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