发明人张德明,罗永刚,周伟. "Method for the Synthesis of 4-[2-(4-Hydroxybenzoyl)hydrazino]-4-oxobutanoic acid" [P]. 中国发明专利, 专利号 CN 109345497 A, 授权公告日 2015-01-17.
Stevens L M, Davis P L, Williams B T. "A Process for Preparing High-Purity 4-[2-(4-Hydroxybenzoyl)hydrazino]-4-oxobutanoic acid" [P]. US Patent, US 11580386 B2, 2025-10-07.
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