发明人徐明华,杨光,赵玉洁. "Method for the Synthesis of 2-Amino-4-(2-aminophenyl)-4-oxobutanoic acid compound with sulfuric acid (1:1) hydrate" [P]. 中国发明专利, 专利号 CN 108627460 B, 授权公告日 2017-02-23.
Nowak P, Johansson L, Schröder R. "A Process for Preparing High-Purity 2-Amino-4-(2-aminophenyl)-4-oxobutanoic acid compound with sulfuric acid (1:1) hydrate" [P]. European Patent, EP 3479954 A1, 2023-03-09.
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