CAS 2640281-87-2 appears in our catalog under these names: 2,2,6,6-Tetramethyl-4-[3-(trimethylammonio)propoxy]-1-piperidinyloxy chloride 94%, 2,2,6,6-Tetramethyl-4-[3-(trimethylammonio)propoxy]-1-piperidinyloxy chloride, 94%, 94%. Offered by: Ambeed, Chemat. Available pack sizes: 250mg, 1g, 5g.