CAS 951921-89-4 appears in our catalog under these names: 2-(4-Chlorophenylsulfonamido)-4-methylthiazole-5-carboxylic acid, 95+%, 2-([(4-Chlorophenyl)sulfonyl]amino)-4-methyl-1,3-thiazole-5-carboxylic acid, 95%. Offered by: AmBeed, Combi-blocks. Available pack sizes: 5g, 250mg, 1g.