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Name the molecular formula for the molecule established as [7-[3-fluoro-4-(oxetan-3-yldiazenyl)phenyl]-1,4,5,6-tetrahydropyrrolo[2,3-b]pyridin-2-yl]-pyrrolidin-1-ylmethanone using the IUPAC nomenclature.
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C21H24FN5O2
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