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system
Name the molecular formula for the molecule established as N-[4-[5-(5-cyano-4-hydroxy-6-oxo-7H-thieno[2,3-b]pyridin-3-yl)-2-phenylthiophen-3-yl]phenyl]methanesulfonamide using the IUPAC nomenclature.
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C25H17N3O4S3
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