CAS 129821-76-7 appears in our catalog under these names: 1,4-Anhydro-5-O-(bis(4-methoxyphenyl)phenylmethyl)-2-deoxy-D-erythro-pentitol 2-cyanoethyl bis(1-methylethyl)phosphoramidite, Abasic amidite 97%, 1',2'-Dideoxy-5'-O-DMT-ribose 3'-CE phosphoramidite, 97%, 97%, dSPACER, 97.85%. Offered by: Biosynth, Ambeed, Chemat, MedChemExpress. Available pack sizes: 0,1g, 0,05g, 0,25g, 0,5g, 1g, 5g, 100mg, 250mg.