CAS 23235-05-4 appears in our catalog under these names: Ethyl 2-acetamidopent-4-ynoate, 97%, Ethyl 2-acetamidopent-4-ynoate, 95%, Ac-D,L-Pra-OEt, 95%, Ac-DL-Pra-OEt, 95%. Offered by: AmBeed, BLDpharm, Combi-blocks. Available pack sizes: 25g, 250mg, 1g, 5g.