CAS 28383-57-5 appears in our catalog under these names: 5–Bromo–1H–pyrrole–2–carboxylic acid, 5-Bromo-1H-pyrrole-2-carboxylic acid, 96%, 5-BroMo-1H-pyrrole-2-carboxylic acid 95%, 5-BROMO-1H-PYRROLE-2-CARBOXYLIC ACID, 95%. Offered by: GLPBio, Combi-blocks, Ambeed, Fluorochem. Available pack sizes: 100mg, 1g, 250mg, 5g.