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Catsyn? Benzoic acid, 4,4',4'',4'''-(1,3,6,8-pyrenetetrayltetra-2,1-ethynediyl)tetrakis- | CAS 1569900-71-5?? ?? ??? ?????. ? ??? C52H26O8??, ???? 778.76g/mol??, ??? ????? NLT 98%???.