1-[2-bromo-2-deoxy-3,5-O-(1,1,3,3-tetraisopropyldisiloxane-1,3-diyl)-4-thio-β-D-ribofuranosyl]thymine

5'-O-acetyl-3'-O-(tert-butyldimethylsilyl)-4-thiothymidine

benzyl 3,5-di-O-benzyl-2-deoxy-1,4-dithio-D-erythro-pentofuranoside