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system
Name the molecular formula for the molecule established as N-[3-(1,3-benzothiazol-2-yl)-6-ethyl-5,7-dihydro-4H-thieno[2,3-c]pyridin-2-yl]-2,2-difluoroacetamide;ethane using the IUPAC nomenclature.
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C20H23F2N3OS2
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