CAS 893750-50-0 appears in our catalog under these names: 1-Cyclopentyl-5-oxo-3-pyrrolidinecarboxylic acid methyl ester, 95%, Methyl 1–cyclopentyl–5–oxopyrrolidine–3–carboxylate. Offered by: Combi-blocks, GLPBio. Available pack sizes: 1g, 5g, 250mg, 100mg.