CAS 15871-58-6 appears in our catalog under these names: Rel-(3R,4R)-4-amino-2,2,5,5-tetramethylpyrrolidine-3-carboxylic acid-1-oxyl, 98%, rac trans-3-Amino-1-oxyl-2,2,5,5-tetramethylpyrrolidine-4-carboxylic Acid, >95% (HPLC), rac trans-3-amino-1-oxyl-2,2,5,5-tetramethylpyrrolidine-4-carboxylic acid. Offered by: Chemat Brand, TRC, Biosynth. Available pack sizes: on request, 10mg, 500mg, 50mg, 5mg, 2mg, 25mg.