CAS 140839-24-3 appears in our catalog under these names: 3'-DMTr-dG(iBu), 3'-DMTr-dG(iBu) 95%, ((2R,3S,5R)-3-(Bis(4-methoxyphenyl)(phenyl)methoxy)-5-(2-isobutyramido-6-oxo-3,6-dihydro-9H-purin-9-yl)tetrahydrofuran-2-yl)methyl (2-cyanoethyl) diisopropylphosphoramidite, 95%, 95%. Offered by: MedChemExpress, Ambeed, Chemat. Available pack sizes: 250 mg, 1 g, 100 mg, 100mg, 250mg, 1g.