CAS 56663-76-4 appears in our catalog under these names: 2,2-Dimethylbut-3-ynoic acid, 2,2-Dimethylbut-3-ynoic acid 92%, 2,2-Dimethylbut-3-ynoic acid, 95%. Offered by: Biosynth, Ambeed, Fluorochem. Available pack sizes: 2,5g, 100mg, 250mg, 1g, 5g, 25g, 10g.