CAS 551910-09-9 appears in our catalog under these names: 5-Carbamoyl-2-(2-chloro-acetylamino)-4-methyl-thiophene-3-carboxylic acid ethyl ester, 95%, Ethyl 5-Carbamoyl-2-(2-chloroacetamido)-4-methylthiophene-3-carboxylate, 95+%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 5g, 1g.