发明人张德明,韩伟,李文辉. "Method for the Synthesis of N,N'-Bis[4-(diphenylamino)phenyl]-N,N'-diphenylbenzidine" [P]. 中国发明专利, 专利号 CN 117759302 B, 授权公告日 2022-09-16.
发明人黄志刚,陈志强,徐明华. "A Process for Preparing High-Purity N,N'-Bis[4-(diphenylamino)phenyl]-N,N'-diphenylbenzidine" [P]. 中国发明专利, 专利号 CN 112758034 A, 授权公告日 2025-05-11.
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