1 5AQ 8-({2-oxo-2-[(2-phenylethyl)amino]ethyl}sulfanyl)adenosine 1.000 2 5AK 8-[(2-{[2-(3-bromophenyl)ethyl]amino}-2-oxoethyl)sulfanyl]adenosine 0.970 3 5A9 5'-azido-8-[(2-{[2-(3-bromophenyl)ethyl]amino}-2-oxoethyl)sulfanyl]-5'-deoxyadenosine 0.861 4 5AG 5'-azido-5'-deoxy-8-[(2-{[2-(3-ethynylphenyl)ethyl]amino}-2-oxoethyl)sulfanyl]adenosine 0.838 5 5A8 5'-azido-5'-deoxy-8-[(2-{[2-(1h-indol-3-yl)ethyl]amino}-2-oxoethyl)sulfanyl]adenosine 0.769