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2-(羟基苯基亚胺基)亚甲基-4-(4’-硝基苯基)偶氮基苯酚及其制备和应用本发明提供了一种化合物2-(羟基苯基亚胺基)亚甲基-4-(4’-硝基苯基)偶氮基苯酚,其由对硝基
2- (hydroxyphenylimino) methylene-4- (4’-nitrophenyl) azo phenol and its preparation and use The present invention provides a compound 2- (hydroxyphenylimino ) Methylene-4- (4’-nitrophenyl) azo phenol, which consists of p-nitro