1 CPA 2'-deoxycytidine-2'-deoxyadenosine-3',5'-monophosphate 1.000 2 CGP 2'-deoxycytidine-2'-deoxyguanosine-3',5'-monophosphate 0.923 3 IXK [5-(6-aminopurin-9-yl)-2-(hydroxymethyl)furan-3-yl] [5-(6-aminopurin-9-yl)-3-oxidanyl-furan-2-yl]methyl hydrogen phosphate 0.854 4 FGO [(1s,3r,3ar,6as)-3-(2-azanyl-6-oxidanylidene-1h-purin-9-yl)-5,5-bis(oxidanyl)-1,3,3a,4,6,6a-hexahydrocyclopenta[C]furan-1-yl]methyl [(2r,3s,4r,5r)-5-[2,4-bis(oxidanylidene)pyrimidin-1-yl]-2-(hydroxymethyl)-4-oxidanyl-oxolan-3-yl] hydrogen phosphate 0.739 5 LQJ 3'-O-[(R)-{[(2s,3as,4s,6s,6as)-6-(6-amino-9h-purin-9-yl)-2-hydroxy-2-oxotetrahydro-2h-2lambda~5~-furo[3,4-D][1,3,2]dioxaphosphol-4-yl]methoxy}(hydroxy)phosphoryl]adenosine 0.723 6 Y4F Cyclic (adenosine-(2'-5')-monophosphate-adenosine-(3'-5')-monophosphate 0.723 7 CSQ O-[(2r,3s,4r,5r)-5-(4-amino-2-oxopyrimidin-1(2h)-yl)-4-hydroxy-2-(hydroxymethyl)tetrahydrofuran-3-yl] O-{[(2r,3s,4r,5r)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2h)-yl)-3,4-dihydroxytetrahydrofuran-2-yl]methyl} hydrogen (R)-phosphorothioate 0.721 8 CSV O-[(2r,3s,4r,5r)-5-(4-amino-2-oxopyrimidin-1(2h)-yl)-4-hydroxy-2-(hydroxymethyl)tetrahydrofuran-3-yl] O-{[(2r,3s,4r,5r)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2h)-yl)-3,4-dihydroxytetrahydrofuran-2-yl]methyl} hydrogen (S)-phosphorothioate 0.721 9 UPU [(2r,3s,4r,5r)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2h)-yl)-3,4-dihydroxytetrahydrofuran-2-yl]methyl (2r,3s,4r,5r)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2h)-yl)-4-hydroxy-2-(hydroxymethyl)tetrahydrofuran-3-yl hydrogen (S)-phosphate 0.721 10 4UR 3'2'-cgamp 0.708