发明人周伟,刘建华,李文辉. "Method for the Synthesis of 3,4-Dimethoxy-5-nitrobenzoic acid" [P]. 中国发明专利, 专利号 CN 113888147 B, 授权公告日 2016-01-24.
发明人张德明,胡光,钱学锋. "A Process for Preparing High-Purity 3,4-Dimethoxy-5-nitrobenzoic acid" [P]. 中国发明专利, 专利号 CN 109856315 B, 授权公告日 2019-01-28.
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