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Catsyn? Benzoic acid, 4,4'-[(9,9-dioctyl-9H-fluorene-2,7-diyl)DI-2,1-ethynediyl]bis- | CAS 1313187-39-1?? ?? ??? ?????. ? ??? C47H50O4??, ???? 678.90g/mol??, ??? ????? NLT 98%???.