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Convert the IUPAC name of a molecule 7-[6-[6-fluoro-5-(1-methylcyclopropyl)oxy-7,7a-dihydro-1H-indazol-3-yl]pyrimidin-4-yl]-6,8-dihydro-5H-[1,2,4]triazolo[1,5-a]pyrazine into molecular formula.
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C20H21FN8O
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