Cytidine, 2′-O-methylguanylyl-(3′→5′)-2′-O-methylcytidylyl-(3′→5′)-2′-O-methylcytidylyl-(3′→5′)-thymidylyl-(3′→5′)-5-methyl-2′-O-methyluridylyl-(3′→5′)-2′-O-methylcytidylyl-(3′→5′)-2′-O-methylcytidylyl-(3′→5′)-2′-O-methyl-

Indeno[2′,1′:4,5]imidazo[1,2-a]purine-6,12-dione, 3,5,5a,10b-tetrahydro-3-D-ribofuranosyl-

Indeno[1′,2′:4,5]imidazo[1,2-a]purine-10,12-dione, 3,5,5a,10a-tetrahydro-3-D-ribofuranosyl-

3,4,6,7-Tetrahydro-3-D-ribofuranosyl-9H-imidazo[1,2-a]purin-9-one