C-(22-Amino-9,9-dimethyl-13-oxo-5,12,17,20-tetraoxa-7,8-dithia-14-azadocoa-1-yl) N-[3-[1-[2-deoxy-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-erythro-pentofuranosyl]-1,2,3,4-tetrahydro-2,4-dioxo-5-pyrimidinyl]-2-propyn-1-yl]carbamate

C-(22-Amino-9,9-dimethyl-13-oxo-5,12,17,20-tetraoxa-7,8-dithia-14-azadocoa-1-yl) N-[3-[2-amino-7-[2-deoxy-3-O-[(methyldithio)methyl]-5-O-phosphono-β-D-erythro-pentofuranosyl]-4,7-dihydro-4-oxo-3H-pyrrolo[2,3-d]pyrimidin-5-yl]-2-propyn-1-yl]carbamate

1-[17-[2-Amino-7-[2-deoxy-3-O-[(methyldithio)methyl]-5-O-phosphono-β-D-erythro-pentofuranosyl]-4,7-dihydro-4-oxo-3H-pyrrolo[2,3-d]pyrimidin-5-yl]-3,3-dimethyl-13-oxo-7,12-dioxa-4,5-dithia-14-azaheptadec-16-yn-1-yl] 12-(9H-fluoren-9-ylmethyl) 5,8-dioxa-2,11-diazadodecanedioate

1-[17-[4-Amino-7-[2-deoxy-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-3-O-[(methyldithio)methyl]-β-D-erythro-pentofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-5-yl]-3,3-dimethyl-13-oxo-7,12-dioxa-4,5-dithia-14-azaheptadec-16-yn-1-yl] 12-(9H-fluoren-9-ylmethyl) 5,8-dioxa-2,11-diazadodecane..

2-Amino-5-(3-amino-1-propyn-1-yl)-7-[2-deoxy-3-O-[(methyldithio)methyl]-5-O-phosphono-β-D-erythro-pentofuranosyl]-3,7-dihydro-4H-pyrrolo[2,3-d]pyrimidin-4-one