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system
Name the molecular formula for the molecule established as 2-[2-(1,3-benzothiazol-2-yl)-5-[(4-chlorophenyl)sulfanylmethyl]-3-oxo-1H-pyrazol-4-yl]-1H-quinolin-4-one using the IUPAC nomenclature.
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C26H17ClN4O2S2
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