CAS 223719-29-7 appears in our catalog under these names: 4,4',(5')-Di(t-butyldicyclohexano)-18-crown-6, 97%, 4,4’,(5’)-Di-(tert-butylcyclohexano)-18-crown-6, 4′,4″(5″)–Di–tert–butyldicyclohexano–18–crown–6, 4′,4″(5″)-Di-tert-butyldicyclohexano-18-crown-6, 4',4''(5'')-DI-TERT-BUTYLDICYCLO- &. Offered by: Chemat Brand, TRC, GLPBio, Biosynth, Sigma-Aldrich. Available pack sizes: on request, 250mg, 10g, 1g, 5g, 0,1g, 0,25g, 0,5g.