1	K2K	(2~{R},3~{R},4~{S},5~{R})-2-(6-aminopurin-9-yl)-5-[[4-(6-azanyl-9~{H}-purin-8-yl)but-3-ynylamino]methyl]oxolane-3,4-diol	1.000
2	K2W	(2~{R},3~{R},4~{S},5~{R})-2-(6-aminopurin-9-yl)-5-[[4-[6-azanyl-9-[(2~{R},3~{R},4~{S},5~{R})-5-(hydroxymethyl)-3,4-bis(oxidanyl)oxolan-2-yl]purin-8-yl]but-3-ynylamino]methyl]oxolane-3,4-diol	0.786