3-(3-Buten-1-yl)-6-[2-deoxy-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-erythro-pentofuranosyl]-4,6-dihydro-1H-pyrimido[4,5-c][1,2]oxazin-7(3H)-one

6-[2-Deoxy-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-erythro-pentofuranosyl]-4,6-dihydro-3-methyl-1H-pyrimido[4,5-c][1,2]oxazin-7(3H)-one

6-[2-Deoxy-3,5-bis-O-(4-methylbenzoyl)-β-D-erythro-pentofuranosyl]-2,3,4,6-tetrahydro-2-[(3-hydroxyphenyl)methyl]pyrimido[4,5-c]pyridazin-7(1H)-one

6-(2-Deoxy-β-D-erythro-pentofuranosyl)-2,3,4,6-tetrahydro-2-(phenylmethyl)pyrimido[4,5-c]pyridazin-7(1H)-one

6-[2-Deoxy-3,5-bis-O-(4-methylbenzoyl)-β-D-erythro-pentofuranosyl]-2,3,4,6-tetrahydro-2-(phenylmethyl)pyrimido[4,5-c]pyridazin-7(1H)-one

5-(2-Chloroethyl)-1-[2-deoxy-3,5-bis-O-(4-methylbenzoyl)-β-D-erythro-pentofuranosyl]-4-(1H-1,2,4-triazol-1-yl)-2(1H)-pyrimidinone

Uridine, 5-(2-chloroethyl)-

Uridine, 5-(2-chloroethyl)-, 2′,3′,5′-triacetate

6-(2-Deoxy-β-D-erythro-pentofuranosyl)-2,3,4,6-tetrahydropyrimido[4,5-c]pyridazin-7(1H)-one

5-(2-Chloroethyl)-1-(2-deoxy-β-D-erythro-pentofuranosyl)-4-(1H-1,2,4-triazol-1-yl)-2(1H)-pyrimidinone

1-[3,5-Bis-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-5-(2-chloroethyl)-4-(1H-1,2,4-triazol-1-yl)-2(1H)-pyrimidinone

Uridine, 3′,5′-bis-O-[bis(4-methoxyphenyl)phenylmethyl]-5-(2-chloroethyl)-2′-deoxy-

6-(2-Deoxy-β-D-erythro-pentofuranosyl)-3-[2-(1,3-dioxan-2-yl)ethyl]-4,6-dihydro-1H-pyrimido[4,5-c][1,2]oxazin-7(3H)-one

Uridine, 2′-deoxy-5-[2-[(1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)oxy]-4-(1,3-dioxan-2-yl)butyl]-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-

Uridine, 2′-deoxy-5-[4-(1,3-dioxan-2-yl)-2-hydroxybutyl]-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-

3-(3-Buten-1-yl)-6-(2-deoxy-β-D-erythro-pentofuranosyl)-4,6-dihydro-1H-pyrimido[4,5-c][1,2]oxazin-7(3H)-one

1H-Isoindole-1,3(2H)-dione, 2-[[1-[[1-[2-deoxy-3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-D-erythro-pentofuranosyl]-1,2-dihydro-2-oxo-4-(1H-1,2,4-triazol-1-yl)-5-pyrimidinyl]methyl]-4-pentenyl]oxy]-

Uridine, 2′-deoxy-5-[2-[(1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)oxy]-5-hexenyl]-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-

Uridine, 2′-deoxy-5-(2-hydroxy-5-hexenyl)-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-

N-[3-[6-(2-Deoxy-β-D-erythro-pentofuranosyl)-3,4,6,7-tetrahydro-7-oxo-1H-pyrimido[4,5-c][1,2]oxazin-3-yl]propyl]-2,4-dinitrobenzeneacetamide