L-Alanine, N-(R)-phosphono-, 1-ethyl ester, cyclic (P→3′,5′)-ester with 9-β-D-arabinofuranosyl-2-fluoro-9H-purin-6-amine

L-Alanine, N-(S)-phosphono-, 1-ethyl ester, cyclic (P→3′,5′)-ester with 9-β-D-arabinofuranosyl-2-fluoro-9H-purin-6-amine

L-Alanine, N-(R)-phosphono-, 1-(phenylmethyl) ester, cyclic (P→3′,5′)-ester with 2-chloro-9-(2-deoxy-2-fluoro-β-D-arabinofuranosyl)-9H-purin-6-amine

L-Alanine, N-(S)-phosphono-, 1-(phenylmethyl) ester, cyclic (P→3′,5′)-ester with 2-chloro-9-(2-deoxy-2-fluoro-β-D-arabinofuranosyl)-9H-purin-6-amine

4-Amino-1-[5-O-[(S)-[(5-nitro-2-furanyl)methoxy][(phenylmethyl)amino]phosphinyl]-β-D-arabinofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[5-O-[(R)-[(5-nitro-2-furanyl)methoxy][(phenylmethyl)amino]phosphinyl]-β-D-arabinofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[5-O-[(S)-[(1S)-1-methyl-2-oxo-2-(phenylmethoxy)ethoxy][(5-nitro-2-thienyl)methoxy]phosphinyl]-β-D-arabinofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[5-O-[(R)-[(1S)-1-methyl-2-oxo-2-(phenylmethoxy)ethoxy][(5-nitro-2-thienyl)methoxy]phosphinyl]-β-D-arabinofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[5-O-[bis[(5-nitro-2-furanyl)methoxy]phosphinyl]-β-D-arabinofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[5-O-[(S)-[(5-nitro-2-thienyl)methoxy][(phenylmethyl)amino]phosphinyl]-β-D-arabinofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[5-O-[[(1-methyl-2-nitro-1H-imidazol-5-yl)methoxy][(2-nitro-5-thiazolyl)methoxy]phosphinyl]-β-D-arabinofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[5-O-[bis[(2-nitro-5-thiazolyl)methoxy]phosphinyl]-β-D-arabinofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[5-O-[(S)-[(1-methyl-2-nitro-1H-imidazol-5-yl)methoxy][(phenylmethyl)amino]phosphinyl]-β-D-arabinofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[5-O-[(R)-[(1-methyl-2-nitro-1H-imidazol-5-yl)methoxy][(phenylmethyl)amino]phosphinyl]-β-D-arabinofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[5-O-[(R)-[(5-nitro-2-thienyl)methoxy][(phenylmethyl)amino]phosphinyl]-β-D-arabinofuranosyl]-2(1H)-pyrimidinone

2-Fluoro-9-[5-O-[[2-[(3-hydroxy-2,2-dimethyl-1-oxopropyl)thio]ethoxy][(phenylmethyl)amino]phosphinyl]-β-D-arabinofuranosyl]-9H-purin-6-amine

2-Fluoro-9-[5-O-[(R)-[2-[(3-hydroxy-2,2-dimethyl-1-oxopropyl)thio]ethoxy][(phenylmethyl)amino]phosphinyl]-2-O-[(phenylmethoxy)carbonyl]-β-D-arabinofuranosyl]-9H-purin-6-amine

2-Fluoro-9-[5-O-[(S)-[2-[(3-hydroxy-2,2-dimethyl-1-oxopropyl)thio]ethoxy][(phenylmethyl)amino]phosphinyl]-2-O-[(phenylmethoxy)carbonyl]-β-D-arabinofuranosyl]-9H-purin-6-amine

9-[5-O-(7,7-Dimethyl-1-oxido-6-oxo-1-[(phenylmethyl)amino]-10,10,10-triphenyl-2,9-dioxa-5-thia-1-phosphadec-1-yl)-2-O-[(phenylmethoxy)carbonyl]-β-D-arabinofuranosyl]-2-fluoro-9H-purin-6-amine

9-[5-O-(7,7-Dimethyl-1-oxido-6-oxo-10,10,10-triphenyl-2,9-dioxa-5-thia-1-phosphadec-1-yl)-2-O-[(phenylmethoxy)carbonyl]-β-D-arabinofuranosyl]-2-fluoro-9H-purin-6-amine