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Catsyn? Tetrahydrobenzo[1,2-C:4,5-C']difuran-1,3,5,7(3AH,7AH)-tetraone | CAS 2754-41-8?? ?? ??? ?????. ? ??? C10H8O6??, ???? 224.17g/mol??, ??? ????? NLT 98%???.