Carbamic acid, N-[2-[(3aR,4R,6R,6aS)-4-(3,4-dihydro-2,4-dioxo-1(2H)-pyrimidinyl)tetrahydro-2-thioxo-6-[(triphenylmethoxy)methyl]furo[3,4-d]oxazol-3(2H)-yl]ethyl]-, 1,1-dimethylethyl ester

Methyl (3aR,4R,6R,6aS)-4-(3,4-dihydro-2,4-dioxo-1(2H)-pyrimidinyl)tetrahydro-2-thioxo-6-[(triphenylmethoxy)methyl]furo[3,4-d]oxazole-3(2H)-hexanoate

Methyl (3aR,4R,6R,6aS)-4-(3,4-dihydro-2,4-dioxo-1(2H)-pyrimidinyl)tetrahydro-2-thioxo-6-[(triphenylmethoxy)methyl]furo[3,4-d]oxazole-3(2H)-butanoate

Methyl (3aR,4R,6R,6aS)-4-(3,4-dihydro-2,4-dioxo-1(2H)-pyrimidinyl)tetrahydro-2-thioxo-6-[(triphenylmethoxy)methyl]furo[3,4-d]oxazole-3(2H)-propanoate

Methyl (3aR,4R,6R,6aS)-4-(3,4-dihydro-2,4-dioxo-1(2H)-pyrimidinyl)tetrahydro-2-thioxo-6-[(triphenylmethoxy)methyl]furo[3,4-d]oxazole-3(2H)-acetate

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-1,3-dihydro-6-(4-nitrophenyl)-2H-pyrrolo[2,3-d]pyrimidin-2-one

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-6-[4-[2-[4-(dimethylamino)phenyl]diazenyl]phenyl]-1,3-dihydro-2H-pyrrolo[2,3-d]pyrimidin-2-one

6-(2-Benzofuranyl)-3-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-1,3-dihydro-2H-pyrrolo[2,3-d]pyrimidin-2-one

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-6-[4-[2-[4-(dimethylamino)phenyl]diazenyl]phenyl]-1,3-dihydro-2H-pyrrolo[2,3-d]pyrimidin-2-one

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-6-(2-furanyl)-1,3-dihydro-2H-pyrrolo[2,3-d]pyrimidin-2-one

6-(2-Benzofuranyl)-3-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-1,3-dihydro-2H-pyrrolo[2,3-d]pyrimidin-2-one

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-1,3-dihydro-6-(4-nitrophenyl)-2H-pyrrolo[2,3-d]pyrimidin-2-one

5-[Bis(4-methoxyphenyl)phenylmethyl]-3-(2-deoxy-β-D-erythro-pentofuranosyl)-6-[4-[2-[4-(dimethylamino)phenyl]diazenyl]phenyl]-1,3-dihydro-2H-pyrrolo[2,3-d]pyrimidin-2-one

5-[Bis(4-methoxyphenyl)phenylmethyl]-3-(2-deoxy-β-D-erythro-pentofuranosyl)-6-(2-furanyl)-1,3-dihydro-2H-pyrrolo[2,3-d]pyrimidin-2-one

6-(2-Benzofuranyl)-5-[bis(4-methoxyphenyl)phenylmethyl]-3-(2-deoxy-β-D-erythro-pentofuranosyl)-1,3-dihydro-2H-pyrrolo[2,3-d]pyrimidin-2-one

5-[Bis(4-methoxyphenyl)phenylmethyl]-3-(2-deoxy-β-D-erythro-pentofuranosyl)-1,3-dihydro-6-(4-nitrophenyl)-2H-pyrrolo[2,3-d]pyrimidin-2-one

Cytidine, N-benzoyl-2′-deoxy-5-iodo-, 3′,5′-diacetate

3-(2-Deoxy-β-D-erythro-pentofuranosyl)-6-[4-[2-[4-(dimethylamino)phenyl]diazenyl]phenyl]-1,3-dihydro-2H-pyrrolo[2,3-d]pyrimidin-2-one

3-(2-Deoxy-β-D-erythro-pentofuranosyl)-6-(2-furanyl)-1,3-dihydro-2H-pyrrolo[2,3-d]pyrimidin-2-one

6-(2-Benzofuranyl)-3-(2-deoxy-β-D-erythro-pentofuranosyl)-1,3-dihydro-2H-pyrrolo[2,3-d]pyrimidin-2-one