CAS 514219-83-1 appears in our catalog under these names: Methyl 2-[(cyanoacetyl)amino]-4-ethyl-5-methylthiophene-3-carboxylate, 95%, Methyl 2-(2-cyanoacetamido)-4-ethyl-5-methylthiophene-3-carboxylate, 97%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 250mg, 1g, 5g.