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Translate the chemical IUPAC name 1-[[2-amino-6-chloro-5-[2-(3,5-difluorocyclohepta-1,3,5-trien-1-yl)ethenyl]pyrimidin-4-yl]amino]-3-(hydroxymethyl)cyclopentane-1,2-diol into its molecular formula.
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C19H21ClF2N4O3
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