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Catsyn? L-proline, 3-ethyl-4-hydroxy-, methyl ester, (3S,4R)-, 4-methylbenzenesulfonate (1:1) | CAS 1799733-43-9?? ?? ??? ?????. ? ??? C15H23NO6S??, ???? 345.41g/mol??, ??? ????? NLT 98%???.