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system
Name the molecular formula for the molecule established as 2'-[[5-methoxy-6-(4-methylimidazol-1-yl)pyridin-3-yl]amino]-8'-methyl-5'-(2,2,2-trifluoroethyl)spiro[cyclopropane-1,7'-pteridine]-6'-one using the IUPAC nomenclature.
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C21H21F3N8O2
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