5'-O-[(N,N-Diisopropylamino)-(2-cyanoethoxy)phosphinyl]-3'-O-(4,4'-dimethoxytrityl)-thymidine

2'-OMe-U Phosphoramidite can be for incorporation of an (otherwise unmodified) reverse (5' to 3') dT nucleobase within an oligonucleotide.

3’-O-DMTr-thymidine 5’-CE phosphoramidite is a purine nucleoside analog. Purine nucleoside analogs have broad antitumor activity targeting indolent lymphoid malignancies. Anticancer mechanisms in this process rely on inhibition of DNA synthesis, induction of apoptosis, etc[1].

[1] Robak T, Robak P. Purine nucleoside analogs in the treatment of rarer chronic lymphoid leukemias. Curr Pharm Des. 2012;18(23):3373-88. DOI:10.2174/138161212801227005
[2] W. MIACHEL HANSON. Reversible Oligonucleotide Chain Blocking Enables Bead Capture and Amplification of T-Cell Receptor α and β Chain mRNAs[J]. Journal of the American Chemical Society, 2016, 138 35: 11073-11076. DOI: 10.1021/jacs.6b04465