CAS 310451-84-4 appears in our catalog under these names: 5-(2-Thienyl)-7-(trifluoromethyl)pyrazolo[1,5-a]pyrimidine-3-carboxylic acid, 95%, 5-(Thiophen-2-yl)-7-(trifluoromethyl)pyrazolo(1,5-a)pyrimidine-3-carboxylic acid, 97%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 250mg, 1g, 5g.