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Lee S K, Patel M V, Park J H. "A Process for Preparing High-Purity N-(6-{[3-chloro-5-(trifluoromethyl)pyridin-2-yl]amino}pyridin-2-yl)-4-methylbenzamide" [P]. US Patent, US 9279232 B2, 2018-07-18.
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