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Williams B T, Park J H, Davis P L. "Method for the Synthesis of 2-Bromo-5-chloro-3-methoxypyridine" [P]. US Patent, US 9574362 B2, 2018-10-02.
Thompson G K, Patel M V, Kumar R. "A Process for Preparing High-Purity 2-Bromo-5-chloro-3-methoxypyridine" [P]. US Patent, US 10309056 B2, 2016-02-08.
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