CAS 23903-46-0 appears in our catalog under these names: Ethyl 5-amino-4-cyano-3-methylthiophene-2-carboxylate, 95%, Ethyl 5-amino-4-cyano-3-methylthiophene-2-carboxylate. Offered by: Combi-blocks, Biosynth. Available pack sizes: 250mg, 1g, 5g, 2g, 10g.