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Catsyn? 5,5'-[9H-Fluoren-9-ylidenebis(4,1-phenyleneoxy)]bis-1,3-isobenzofurandione | CAS 59507-08-3?? ?? ??? ?????. ? ??? C41H22O8??, ???? 642.61g/mol??, ??? ????? NLT 98%???.