N4-Bz-C-(S)-GNA phosphoramidite is an important intermediate for the synthesis of nucleic acids and their analogs[1].
References
[1] Christensen MS, et al. Synthetic nucleic acid secondary structures containing the four stereoisomers of 1,4-bis(thymine-1-yl)butane-2,3-diol. Org Biomol Chem. 2008 Jan 7;6(1):81-91. DOI:10.1039/b713888a