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Catsyn? N-[4-[2-(2-amino-4,5,6,7-tetrahydro-4,6-dioxo-1H-pyrrolo[2,3-D]pyrimidin-5-YL)ethyl]benzoyl]-L-glutamic acid | CAS 193281-00-4?? ?? ??? ?????. ? ??? C20H21N5O7??, ???? 443.41g/mol??, ??? ????? NLT 98%???.