CAS 937601-51-9 appears in our catalog under these names: 1-[1-(tert-Butoxycarbonyl)-4-piperidinyl]-5-oxo-3-pyrrolidinecarboxylic acid, 96%, 1-(1-(tert-Butoxycarbonyl)-4-piperidinyl)-5-oxo-3-pyrrolidinecarboxylic acid. Offered by: Combi-blocks, Biosynth. Available pack sizes: 250mg, 5g, 1g, 0,5g.