7-[5-Deoxy-2,3-O-(1-methylethylidene)-5-(5-oxa-2,8-diazaspiro[3.5]non-8-yl)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine

7-[5-Deoxy-5-(2,6-diazaspiro[3.5]non-6-yl)-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine

N-Benzoyl-5′-deoxy-5′-(1,6-diazaspiro[3.3]hept-1-yl)-2′,3′-O-(1-methylethylidene)adenosine

N-Benzoyl-5′-deoxy-5′-(1,6-diazaspiro[3.3]hept-6-yl)-2′,3′-O-(1-methylethylidene)adenosine

N-Benzoyl-5′-deoxy-5′-(2,5-diazaspiro[3.4]oct-5-yl)-2′,3′-O-(1-methylethylidene)adenosine

N-Benzoyl-5′-deoxy-5′-(1,6-diazaspiro[3.4]oct-1-yl)-2′,3′-O-(1-methylethylidene)adenosine

N-Benzoyl-5′-deoxy-5′-(2,6-diazaspiro[3.4]oct-6-yl)-2′,3′-O-(1-methylethylidene)adenosine

N-Benzoyl-5′-deoxy-5′-(1,6-diazaspiro[3.4]oct-6-yl)-2′,3′-O-(1-methylethylidene)adenosine

N-Benzoyl-5′-deoxy-5′-(2,6-diazaspiro[3.4]oct-2-yl)-2′,3′-O-(1-methylethylidene)adenosine

N-Benzoyl-5′-deoxy-5′-(2,5-diazaspiro[3.4]oct-2-yl)-2′,3′-O-(1-methylethylidene)adenosine

N-Benzoyl-5′-deoxy-5′-(2,6-diazaspiro[3.5]non-6-yl)-2′,3′-O-(1-methylethylidene)adenosine

N-Benzoyl-5′-deoxy-5-(1,7-diazaspiro[3.5]non-1-yl)-2′,3′-O-(1-methylethylidene)adenosine

N-Benzoyl-5′-deoxy-5′-(2,5-diazaspiro[3.5]non-2-yl)-2′,3′-O-(1-methylethylidene)adenosine

N-Benzoyl-5′-deoxy-5′-(2,5-diazaspiro[3.5]non-5-yl)-2′,3′-O-(1-methylethylidene)adenosine

N-Benzoyl-5′-deoxy-5′-(2,6-diazaspiro[3.5]non-2-yl)-2′,3′-O-(1-methylethylidene)adenosine

N-Benzoyl-5′-deoxy-5-(2,7-diazaspiro[4.4]non-2-yl)-2′,3′-O-(1-methylethylidene)adenosine

N-Benzoyl-5′-deoxy-5′-(1,7-diazaspiro[4.4]non-7-yl)-2′,3′-O-(1-methylethylidene)adenosine

N-Benzoyl-5′-deoxy-5′-(1,7-diazaspiro[4.4]non-1-yl)-2′,3′-O-(1-methylethylidene)adenosine

N-Benzoyl-5′-deoxy-5′-(2,8-diazaspiro[4.5]dec-2-yl)-2′,3′-O-(1-methylethylidene)adenosine

N-Benzoyl-5′-deoxy-5′-(1,8-diazaspiro[4.5]dec-1-yl)-2′,3′-O-(1-methylethylidene)adenosine