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Catsyn? 1,3-Benzenedicarboxylic acid, 5,5'-(1,4-phenylenedi-2,1-ethynediyl)bis- | CAS 957014-40-3?? ?? ??? ?????. ? ??? C26H14O8??, ???? 454.38g/mol??, ??? ????? NLT 98%???.