CAS 50397-65-4 appears in our catalog under these names: Methyl 2-(4-bromobenzenesulfonyl)acetate, Methyl 2-(4-bromobenzenesulfonyl)acetate, 95%, Methyl 2-[(4-bromobenzene)sulfonyl]acetate, 95%. Offered by: Biosynth, AmBeed, Combi-blocks. Available pack sizes: 1g, 100mg, 5g, 250mg.