1-[(5S,6R,8R,9R)-9-(Acetyloxy)-4-amino-8-[(benzoyloxy)methyl]-2,2-dioxido-1,7-dioxa-2-thiaspiro[4.4]non-3-en-6-yl]-3-hexyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6R,8R,9R)-9-(Acetyloxy)-4-amino-8-[(benzoyloxy)methyl]-2,2-dioxido-1,7-dioxa-2-thiaspiro[4.4]non-3-en-6-yl]-3-hexyl-2,4(1H,3H)-pyrimidinedione

1-[(5S,6R,8R,9S)-4-Amino-9-hydroxy-2,2-dioxido-8-[(phenylmethoxy)methyl]-1-(phenylmethyl)-7-oxa-2-thia-1-azaspiro[4.4]non-3-en-6-yl]-3-hexyl-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6R,8R,9S)-4-Amino-9-hydroxy-2,2-dioxido-8-[(phenylmethoxy)methyl]-1-(phenylmethyl)-7-oxa-2-thia-1-azaspiro[4.4]non-3-en-6-yl]-3-hexyl-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6R,8R,9R)-9-(Acetyloxy)-4-amino-6-[(benzoyloxy)methyl]-2,2-dioxido-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-3-dodecyl-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6R,8R,9R)-9-(Acetyloxy)-4-amino-6-[(benzoyloxy)methyl]-2,2-dioxido-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-5-methyl-3-undecyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6R,8R,9R)-9-(Acetyloxy)-4-amino-6-[(benzoyloxy)methyl]-2,2-dioxido-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-3-decyl-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6R,8R,9R)-9-(Acetyloxy)-4-amino-6-[(benzoyloxy)methyl]-2,2-dioxido-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-5-methyl-3-nonyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6R,8R,9R)-9-(Acetyloxy)-4-amino-6-[(benzoyloxy)methyl]-2,2-dioxido-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-5-methyl-3-octyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6R,8R,9R)-9-(Acetyloxy)-4-amino-6-[(benzoyloxy)methyl]-2,2-dioxido-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-3-heptyl-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6R,8R,9R)-9-(Acetyloxy)-4-amino-6-[(benzoyloxy)methyl]-2,2-dioxido-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-3-ethyl-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[2-C-Cyano-2-O-(methylsulfonyl)-3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-D-arabinofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6S,8R,9R)-4-Amino-6-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-9-hydroxy-2,2-dioxido-7-oxa-2-thia-1-azaspiro[4.4]non-3-en-8-yl]-3-hexyl-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6S,8R,9R)-4-Amino-9-hydroxy-6-(hydroxymethyl)-2,2-dioxido-7-oxa-2-thia-1-azaspiro[4.4]non-3-en-8-yl]-3-hexyl-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[(5S,6S,8R,9R)-9-(Acetyloxy)-4-amino-6-[(benzoyloxy)methyl]-2,2-dioxido-7-oxa-2-thia-1-azaspiro[4.4]non-3-en-8-yl]-3-hexyl-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6S,8R,9R)-4-Amino-6-[(benzoyloxy)methyl]-9-hydroxy-2,2-dioxido-7-oxa-2-thia-1-azaspiro[4.4]non-3-en-8-yl]-3-hexyl-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[(5S,6S,8R,9R)-4-Amino-6-[(benzoyloxy)methyl]-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-2,2-dioxido-7-oxa-2-thia-1-azaspiro[4.4]non-3-en-8-yl]-3-hexyl-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[(5S,6S,8R,9R)-4-Amino-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-6-(hydroxymethyl)-2,2-dioxido-7-oxa-2-thia-1-azaspiro[4.4]non-3-en-8-yl]-3-hexyl-5-methyl-2,4(1H,3H)-pyrimidinedione