5-Chloro-1-[2-deoxy-5-O-(triphenylmethyl)-β-D-threo-pentofuranosyl]-2,4(1H,3H)-pyrimidinedione

Cytidine, 5-fluoro-2′-O-methyl-N-(2-methyl-1-oxopropyl)-

Ethyl 2,3-dihydro-3-[2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-2-oxo[1,4]dithiino[2,3-d]pyrimidine-6-carboxylate

Ethyl 2,3-dihydro-3-[2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-2-oxo[1,4]oxathiino[2,3-d]pyrimidine-6-carboxylate

Uridine, 4-S-(3-ethoxy-2,3-dioxopropyl)-5-mercapto-2′,3′-O-(1-methylethylidene)-4-thio-

Uridine, 4-O-(3-ethoxy-2,3-dioxopropyl)-5-mercapto-2′,3′-O-(1-methylethylidene)-

Uridine, 4-S-(3-ethoxy-2,3-dioxopropyl)-2′,3′-O-(1-methylethylidene)-4-thio-5-thiocyanato-

Uridine, 4-O-(3-ethoxy-2,3-dioxopropyl)-2′,3′-O-(1-methylethylidene)-5-thiocyanato-

Ethyl 2,3-dihydro-3-[2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-2-oxo-6-phenyl[1,4]dithiino[2,3-d]pyrimidine-7-carboxylate

Ethyl 2,3-dihydro-6-methyl-3-[2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-2-oxo[1,4]dithiino[2,3-d]pyrimidine-7-carboxylate

Ethyl 2,3-dihydro-3-[2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-2-oxo-6-phenyl[1,4]oxathiino[2,3-d]pyrimidine-7-carboxylate

Ethyl 2,3-dihydro-6-methyl-3-[2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-2-oxo[1,4]oxathiino[2,3-d]pyrimidine-7-carboxylate

Uridine, 4-S-(1-benzoyl-2-ethoxy-2-oxoethyl)-5-mercapto-2′,3′-O-(1-methylethylidene)-4-thio-, ethyl ester

Uridine, 4-S-[1-(ethoxycarbonyl)-2-oxopropyl]-5-mercapto-2′,3′-O-(1-methylethylidene)-4-thio-

Uridine, 4-O-(1-benzoyl-2-ethoxy-2-oxoethyl)-5-mercapto-2′,3′-O-(1-methylethylidene)-

Uridine, 4-O-[1-(ethoxycarbonyl)-2-oxopropyl]-5-mercapto-2′,3′-O-(1-methylethylidene)-

Uridine, 4-S-(1-benzoyl-2-ethoxy-2-oxoethyl)-2′,3′-O-(1-methylethylidene)-4-thio-5-thiocyanato-

Uridine, 4-S-[1-(ethoxycarbonyl)-2-oxopropyl]-2′,3′-O-(1-methylethylidene)-4-thio-5-thiocyanato-

Uridine, 4-O-(1-benzoyl-2-ethoxy-2-oxoethyl)-2′,3′-O-(1-methylethylidene)-5-thiocyanato-

Uridine, 4-O-[1-(ethoxycarbonyl)-2-oxopropyl]-2′,3′-O-(1-methylethylidene)-5-thiocyanato-