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Name the molecular formula for the molecule established as methyl 2-[[1-(3-chloro-4-fluorophenyl)-2,2,2-trifluoroethyl]carbamoyl]-1-ethyl-6-methylpyrrolo[2,3-b]pyridine-5-carboxylate using the IUPAC nomenclature.
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C21H18ClF4N3O3
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