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Catsyn? 2,2',7,7'-Tetrakis[N,n-DI(4-methoxyphenyl)amino]-9,9'-spirobifluorene | CAS 207739-72-8?? ?? ??? ?????. ? ??? C81H68N4O8??, ???? 1225.43g/mol??, ??? ????? NLT 98%???.