CAS 33143-92-9 appears in our catalog under these names: 4-[(1,1-Dimethylprop-2-ynyl)oxy]benzonitrile, 95%, 4-((2-Methylbut-3-yn-2-yl)oxy)benzonitrile, 98%, 98%, 4-((2-Methylbut-3-yn-2-yl)oxy)benzonitrile, 98%. Offered by: Combi-blocks, Chemat, Fluorochem. Available pack sizes: 250mg, 5g, 1g, 100mg.