CAS 18999-45-6 appears in our catalog under these names: 3-(1H-Imidazol-1-yl)propanoic acid, 95%, 3–(1–Imidazolyl)propanoic Acid, 3-(1H-Imidazol-1-yl)propanoic acid, 97% , 3-(1-Imidazolyl)propanoic Acid 95%, 3-(1-Imidazolyl)propanoic Acid, 95%, 95%. Offered by: Combi-blocks, GLPBio, Thermo Scientific, Ambeed, Chemat. Available pack sizes: 1g, 5g, 250mg, 100mg, 10g, 25g.