4-chloro-1H-pyrrolo[2,3-d]pyrimidine
4-chloro-7-(2,3-dideoxy-β-D-glycero-pentofuranosyl)-7H-pyrrolo<2,3-d>pyrimidine
2-deoxy-3,5-di-O-p-toluoyl-α-D-erythro-pentofuranosyl chloride
4-Chloro-7-(2-deoxy-β-D-erythro-pentofuranosyl)-5'-O-(4,4'-dimethoxytrityl)-3'-O-phenoxythiocarbonyl-7H-pyrrolo<2,3-d>pyrimidine
4-Chloro-7-(2-deoxy-β-D-erythro-pentofuranosyl)-5'-O-(4,4'-dimethoxytrityl)-7H-pyrrolo<2,3-d>pyrimidine