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Catsyn? 4,4',4'',4'''-([1,1'-Biphenyl]-3,3',5,5'-tetrayltetrakis(ethyne-2,1-diyl))tetrabenzoic acid | CAS 1569900-74-8?? ?? ??? ?????. ? ??? C48H26O8??, ???? 730.72g/mol??, ??? ????? NLT 98%???.