2-amino-7-[2-deoxy-β-D-erythro-pentofuranosyl]-4-isobutoxy-7H-pyrrolo[2,3-d]pyrimidine

2-amino-4-chloro-7-[2-deoxy-3',5'-di-O-(p-toluoyl)-β-D-erythro-pentofuranosyl]-3,7-dihydro-4H-pyrrolo[2,3-d]pyrimidine

2-amino-4-isobutoxy-7H-pyrrolo[2,3-d]pyrimidine

(2-amino-9-(2'-deoxy-β-D-erythro-pentofuranosyl)-7H-pyrrolo[2,3-d]pyrimidin-6-thione

2-amino-7-[2-deoxy-3,5-di-O-(p-toluoyl)-β-D-erythro-pentofuranosyl]-4-isobutoxy-7H-pyrrolo[2,3-d]pyrimidine