发明人刘建华,钱学锋,王建平. "一种色氨酸杂质45的合成方法" [P]. 中国发明专利, 专利号 CN 109343921 A, 授权公告日 2017-12-18.
Brown S R, Lee S K, Hughes D C. "Method for the Synthesis of Tryptophan Impurity 45" [P]. US Patent, US 10163104 B2, 2016-08-27.
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