发明人朱建伟,刘建华,郭海燕. "Method for the Synthesis of Sodium 4-((4-((4-((4-sulfonatophenyl)amino)phenyl)(4-((4-sulfophenyl)amino)phenyl)methylene)cyclohexa-2,5-dien-1-ylidene)amino)benzenesulfonate" [P]. 中国发明专利, 专利号 CN 114646987 B, 授权公告日 2015-09-07.
发明人张德明,刘建华,郭海燕. "A Process for Preparing High-Purity Sodium 4-((4-((4-((4-sulfonatophenyl)amino)phenyl)(4-((4-sulfophenyl)amino)phenyl)methylene)cyclohexa-2,5-dien-1-ylidene)amino)benzenesulfonate" [P]. 中国发明专利, 专利号 CN 108009907 A, 授权公告日 2016-12-01.
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