2-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]pyrimido[5,4-e]pyrrolo[1,2-c]pyrimidine-3,6(2H,4H)-dione

2-(2-Deoxy-β-D-erythro-pentofuranosyl)pyrimido[5,4-e]pyrrolo[1,2-c]pyrimidine-3,6(2H,4H)-dione

7-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-4,7-dihydro-2,4-dioxo-N1,N1,N3,N3-tetraphenyl-1H-pyrrolo[2,3-d]pyrimidine-1,3(2H)-dicarboxamide

7-[2-Deoxy-5-O-[(diphenylamino)carbonyl]-β-D-erythro-pentofuranosyl]-4,7-dihydro-2,4-dioxo-N1,N1,N3,N3-tetraphenyl-1H-pyrrolo[2,3-d]pyrimidine-1,3(2H)-dicarboxamide

7-(2-Deoxy-β-D-erythro-pentofuranosyl)-4,7-dihydro-2,4-dioxo-N1,N1,N3,N3-tetraphenyl-1H-pyrrolo[2,3-d]pyrimidine-1,3(2H)-dicarboxamide

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-2,6-di-O-2-propen-1-ylxanthosine

7-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-2,4-bis(2-propen-1-yloxy)-7H-pyrrolo[2,3-d]pyrimidine

2′-Deoxy-2,6-di-O-2-propen-1-ylxanthosine

7-(2-Deoxy-β-D-erythro-pentofuranosyl)-2,4-bis(2-propen-1-yloxy)-7H-pyrrolo[2,3-d]pyrimidine

7-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-2,4-bis[2-(4-nitrophenyl)ethoxy]-7H-pyrrolo[2,3-d]pyrimidine

7-(2-Deoxy-β-D-erythro-pentofuranosyl)-2,4-bis[2-(4-nitrophenyl)ethoxy]-7H-pyrrolo[2,3-d]pyrimidine

7-(3,5-Di-O-acetyl-2-deoxy-β-D-erythro-pentofuranosyl)-2,4-bis[2-(4-nitrophenyl)ethoxy]-7H-pyrrolo[2,3-d]pyrimidine

7-(3,5-Di-O-acetyl-2-deoxy-β-D-erythro-pentofuranosyl)-3,7-dihydro-4-[2-(4-nitrophenyl)ethoxy]-2H-pyrrolo[2,3-d]pyrimidin-2-one

7-(3,5-Di-O-acetyl-2-deoxy-β-D-erythro-pentofuranosyl)-4-[2-(4-nitrophenyl)ethoxy]-7H-pyrrolo[2,3-d]pyrimidin-2-amine

2-[[Bis(4-methoxyphenyl)phenylmethyl]amino]-7-(3,5-di-O-acetyl-2-deoxy-β-D-erythro-pentofuranosyl)-3,7-dihydro-4H-pyrrolo[2,3-d]pyrimidin-4-one

2-Amino-7-(3,5-di-O-acetyl-2-deoxy-β-D-erythro-pentofuranosyl)-3,7-dihydro-4H-pyrrolo[2,3-d]pyrimidin-4-one

7-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-4,7-dihydro-2,4-dioxo-N1,N1,N3,N3-tetraphenyl-1H-pyrrolo[2,3-d]pyrimidine-1,3(2H)-dicarboxamide

Xanthosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-2,6-di-O-2-propen-1-yl-, 3′-[2-cyanoethyl N,N-bis(1-methylethyl)phosphoramidite]

7-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-2,4-bis(2-propen-1-yloxy)-7H-pyrrolo[2,3-d]pyrimidine

3-Bromo-1-(2-deoxy-β-D-erythro-pentofuranosyl)-1H-pyrazolo[3,4-d]pyrimidine-4,6(5H,7H)-dione