CAS 158154-63-3 appears in our catalog under these names: Ethyl 5-(tert-butyl)-1,2,4-oxadiazole-3-carboxylate, 97%, Ethyl 5-tert-butyl-1,2,4-oxadiazole-3-carboxylate, 95%, Ethyl 5-(tert-butyl)-1,2,4-oxadiazole-3-carboxylate, 98%. Offered by: Ambeed, BLDpharm, Fluorochem, Chemat. Available pack sizes: 100mg, 250mg, 1g, 5g.