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For the molecule named N-[2-[2-chloro-5-(trifluoromethoxy)phenyl]-1H-pyrrolo[2,3-b]pyridin-5-yl]-4,5-dimethylpyrazolidine-3-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C20H19ClF3N5O2
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