(1R,3R,4R,7S)-1-((bis(4-methoxyphenyl)(phenyl)methoxy)methyl)-3-(2,4-dioxo-5-(thiazol-2-yl)-3,4-dihydropyrimidin-1(2H)-yl)-2,5-dioxabicyclo[2.2.1]heptan-7-yl (2-cyanoethyl) diisopropylphosphoramidite

1-((1R,3R,4R,7S)-1-((bis(4-methoxyphenyl)(phenyl)methoxy)methyl)-7-((tert-butyldimethylsilyl)oxy)-2,5-dioxabicyclo[2.2.1]heptan-3-yl)-5-(thiazol-2-yl)pyrimidine-2,4(1H,3H)-dione