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Catsyn? 1-(2,2-Dimethoxyethyl)-5-methoxy-6-(methoxycarbonyl)-4-oxo-1,4-dihydropyridine-3-carboxylic acid | CAS 1335210-23-5?? ?? ??? ?????. ? ??? C13H17NO8??, ???? 315.28g/mol??, ??? ????? NLT 98%???.