CAS 438220-53-2 appears in our catalog under these names: Ethyl 2-amino-4-(3,4-dimethylphenyl)-5-methylthiophene-3-carboxylate, 95%, Ethyl 2-amino-4-(3,4-dimethylphenyl)-5-methylthiophene-3-carboxylate, 95+%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 1g, 5g.