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Catsyn? 5'-(4-Carboxyphenyl)-[1,1':3',1''-terphenyl]-3,3''-dicarboxylic acid | CAS 1259390-34-5?? ?? ??? ?????. ? ??? C27H18O6??, ???? 438.43g/mol??, ??? ????? NLT 98%???.