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Catsyn? 1,1':3',1'':4'',1''':3''',1''''-Quinquephenyl]-4,4''''-dicarboxylic acid, 5',5'''-bis(4-carboxyphenyl)-2'',5''-dimethoxy- | CAS 1800290-01-0?? ?? ??? ?????. ? ??? null??, ???? g/mol??, ??? ????? NLT 98%???.