1	6W8	[(3~{S},4~{R})-4-(2-azanyl-6-oxidanylidene-1~{H}-purin-9-yl)pyrrolidin-3-yl]oxymethylphosphonic acid	1.000
2	6W7	[(3~{S},4~{R})-4-(6-oxidanylidene-1~{H}-purin-9-yl)pyrrolidin-3-yl]oxymethylphosphonic acid	0.955