CAS 88867-96-3 appears in our catalog under these names: 1-[(4-Nitrophenyl)sulfonyl]pyrrolidine-2-carboxylic acid, 95%, 1-((4-Nitrophenyl)sulfonyl)pyrrolidine-2-carboxylic acid, 97%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 250mg, 5g, 1g.