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system
Provide the molecular formula for the IUPAC named substance 1-[[5-[3-(2,2-difluoroethyl)-2-methylimidazo[4,5-b]pyridin-5-yl]pyrrolo[2,1-f][1,2,4]triazin-2-yl]amino]-2-methylpropan-2-ol .
user
C19H21F2N7O
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