CAS 666832-71-9 appears in our catalog under these names: (2S)-3,3-Dimethyl-2-((2,2,2-trifluoroacetyl)amino)butanoic acid, Tfa-3-Me-Val-OH 98%, (S)-3,3-Dimethyl-2-(2,2,2-trifluoroacetamido)butanoic acid, 98%, 98%, (S)-3,3-Dimethyl-2-(2,2,2-trifluoroacetamido)butanoic acid, 95%. Offered by: Biosynth, Ambeed, Chemat, Fluorochem. Available pack sizes: 2kg, 1kg, 100mg, 250mg, 1g, 5g, 25g, 100g.