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Chen K W, Brown S R, Lee S K. "Method for the Synthesis of 4-Bromo-2-cyanophenylacetic Acid" [P]. US Patent, US 10914484 B2, 2019-01-06.
Kumar R, Thompson G K, Klinger H. "A Process for Preparing High-Purity 4-Bromo-2-cyanophenylacetic Acid" [P]. US Patent, US 11282963 B2, 2021-10-08.
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