1 QXP 5'-{[(benzenecarbonyl)sulfamoyl]amino}-5'-deoxyadenosine 1.000 2 QXG 5'-{[(2-amino-3-hydroxybenzene-1-carbonyl)sulfamoyl]amino}-5'-deoxyadenosine 0.970 3 R2V 5'-deoxy-5'-{[(3-hydroxybenzene-1-carbonyl)sulfamoyl]amino}adenosine 0.939 4 YDO 5'-deoxy-5'-(ethylsulfamamido)adenosine 0.727