5′-[[[1-[2-[[(2-Amino-3,4,7,8-tetrahydro-7,7-dimethyl-4-oxo-6-pteridinyl)carbonyl]amino]ethyl]-2-carboxy-4-piperidinyl]sulfonyl]amino]-5′-deoxyadenosine

5′-[[[1-[2-[[(2-Amino-3,4,7,8-tetrahydro-7,7-dimethyl-4-oxo-6-pteridinyl)carbonyl]amino]ethyl]-2-(methoxycarbonyl)-4-piperidinyl]sulfonyl]amino]-5′-deoxyadenosine

5′-[[[1-(2-Aminoethyl)-2-(methoxycarbonyl)-4-piperidinyl]sulfonyl]amino]-5′-deoxyadenosine

5′-Deoxy-5′-[[[1-[2-[[(1,1-dimethylethoxy)carbonyl]amino]ethyl]-2-(methoxycarbonyl)-4-piperidinyl]sulfonyl]amino]-2′,3′-O-(1-methylethylidene)adenosine

5′-Deoxy-5′-[[[2-(methoxycarbonyl)-4-piperidinyl]sulfonyl]amino]-2′,3′-O-(1-methylethylidene)adenosine

5′-Deoxy-5′-[[[2-(methoxycarbonyl)-1-(4-methoxyphenyl)-4-piperidinyl]sulfonyl]amino]-2′,3′-O-(1-methylethylidene)adenosine