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

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

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

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