发明人徐明华,何建平,杨光. "Method for the Synthesis of N1,N1-Bis(3-(diphenylamino)phenyl)-N3,N3-diphenylbenzene-1,3-diamine" [P]. 中国发明专利, 专利号 CN 109993376 A, 授权公告日 2020-02-06.
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