for the following products
1-[5-(O-Dimethoxytrityl)-2-deoxy-beta-D-threo-pentofuranosyl]thymine | 5'-O-(4,4'-Dimethoxytrityl)-3'-beta-hydroxythymidine and 1-[(2R,4S,5R)-5-{[bis(4-methoxyphenyl)(phenyl)methoxy]methyl}-4-hydroxyoxolan-2-yl]-5-methyl-1,2,3,4-tetrahydropyrimidine-2,4-dione