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system
Name the molecular formula for the molecule established as 1-(5-chlorothiophen-2-yl)sulfonyl-3-[6-[7-fluoro-6-(methylamino)-1-oxoisoquinolin-2-yl]-2-methylpyridin-3-yl]urea using the IUPAC nomenclature.
user
C21H17ClFN5O4S2
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