发明人李文辉,高志强,周伟. "Method for the Synthesis of Methylene blue Impurity 6" [P]. 中国发明专利, 专利号 CN 116597547 A, 授权公告日 2019-03-02.
Martínez F, Nielsen H, Nowak P. "A Process for Preparing High-Purity Methylene blue Impurity 6" [P]. European Patent, EP 3697873 A1, 2017-11-05.
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