Patel M V, Hughes D C, Chen K W. "Method for the Synthesis of 4-Methanesulfonyl-2-({5-nitro-6-[phenyl(propan-2-yl)amino]pyrimidin-4-yl}amino)butanoic acid" [P]. US Patent, US 11642477 B2, 2017-03-13.
发明人赵玉洁,徐明华,沈红梅. "A Process for Preparing High-Purity 4-Methanesulfonyl-2-({5-nitro-6-[phenyl(propan-2-yl)amino]pyrimidin-4-yl}amino)butanoic acid" [P]. 中国发明专利, 专利号 CN 111244381 A, 授权公告日 2020-09-23.
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