(1S, 3R, 4R, 6S, 7S) - 1- ((Bis(4- Methoxyphenyl) (Phenyl) Methoxy) Methyl) - 3- (2- Isobutyramido- Propanamide, N-[9-[2,5-anhydro-4-C-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-6-deoxy-α-L-mannofuranosyl]-6,9-dihydro-6-oxo-1H-purin-2-yl]-2-methyl- N6-Bz-2'-O-4'-G-Locked-Gr-CET-Phosphoramidite (1S, 3R, 4R, 6S, 7S) - 1- ((Bis(4- Methoxyphenyl) (Phenyl) Methoxy) Methyl) (1s,3r,4r,6s,7s)-1-((bis(4-methoxyphenyl)(phenyl)methoxy)methyl)-3-(2-isobutyramido-6-oxo-1h-purin-9(6h)-yl)-6-methyl-2,5-dioxabicyclo[2.2.1]heptan-7-yl 2-cyanoethyl diisopropylphosphoramidite CET-rG(ibu) Phosphoramidite S-cEt-G(iBu)-CE-Phosphoramidite