CAS 565191-90-4 appears in our catalog under these names: Ethyl 2-[(chloroacetyl)amino]-4-ethyl-5-methylthiophene-3-carboxylate, 95%, Ethyl 2-((chloroacetyl)amino)-4-ethyl-5-methylthiophene-3-carboxylate, 95%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 1g, 5g.