CAS 133749-16-3 appears in our catalog under these names: 1-[4-(Acetylamino)phenyl]-5-oxopyrrolidine-3-carboxylic acid, 95%, 1-(4-Acetamidophenyl)-5-oxopyrrolidine-3-carboxylic acid, 97%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 250mg, 1g, 10g, 5g.