Spiro[furan-2(3H),7′(6′H)-pyrrolo[1,2-c]pyrimidine]-1′,3′(2′H,5′H)-dione, 3,4-bis(acetyloxy)-5-[(acetyloxy)methyl]-4,5-dihydro-6′-phenyl-, (2R,3S,4R,5R,6′R)-

Spiro[furan-2(3H),7′(6′H)-pyrrolo[1,2-c]pyrimidine]-1′,3′(2′H,5′H)-dione, 3,4-bis(acetyloxy)-5-[(acetyloxy)methyl]-4,5-dihydro-6′-phenyl-, (2R,3S,4R,5R,6′S)-

Spiro[furan-2(3H),7′(6′H)-pyrrolo[1,2-c]pyrimidine]-1′,3′(2′H,5′H)-dione, 3,4-bis(acetyloxy)-5-[(acetyloxy)methyl]-4,5-dihydro-6′-phenyl-, (2R,3R,4R,5R,6′S)-

Spiro[furan-2(3H),7′(6′H)-pyrrolo[1,2-c]pyrimidine]-1′,3′(2′H,5′H)-dione, 3,4-bis[[(1,1-dimethylethyl)dimethylsilyl]oxy]-5-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-4,5-dihydro-6′-phenyl-, (2R,3R,4R,5R,6′R)-

Uridine, 5′-O-[(1,1-dimethylethyl)dimethylsilyl]-6-[(1Z)-2-iodoethenyl]-2′,3′-O-(1-methylethylidene)-

Uridine, 6-[(1Z)-2-bromoethenyl]-5′-O-[(1,1-dimethylethyl)dimethylsilyl]-2′,3′-O-(1-methylethylidene)-

Uridine, 5′-O-[(1,1-dimethylethyl)dimethylsilyl]-2′,3′-O-(1-methylethylidene)-6-[(1Z)-2-(tributylstannyl)ethenyl]-

5′-O-[(1,1-Dimethylethyl)dimethylsilyl]-6-ethyl-2′,3′-O-(1-methylethylidene)uridine

(6E)-5′-O-[(1,1-Dimethylethyl)dimethylsilyl]-6-ethylidene-5,6-dihydro-2′,3′-O-(1-methylethylidene)uridine

Spiro[furan-2(3H),7′(6′H)-pyrrolo[1,2-c]pyrimidine]-1′,3′(2′H,5′H)-dione, 3,4-bis(acetyloxy)-5-[(acetyloxy)methyl]-4,5-dihydro-6′-phenyl-, (2S,3S,4R,5R,6′R)-

Spiro[furan-2(3H),7′(6′H)-pyrrolo[1,2-c]pyrimidine]-1′,3′(2′H,5′H)-dione, 3,4-bis(acetyloxy)-5-[(acetyloxy)methyl]-4,5-dihydro-6′-phenyl-, (2S,3S,4R,5R,6′S)-

Spiro[furan-2(3H),7′(6′H)-pyrrolo[1,2-c]pyrimidine]-1′,3′(2′H,5′H)-dione, 4-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-5-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-4,5-dihydro-3-hydroxy-6′-phenyl-, (2R,3S,4S,5R,6′R)-

Spiro[8H-furo[3,2-f]-1,3,5,2,4-trioxadisilocin-8,7′(1′H)-pyrrolo[1,2-c]pyrimidine]-1′,3′(2′H)-dione, 5′,6,6′,6a,9,9a-hexahydro-2,2,4,4-tetrakis(1-methylethyl)-, (6aR,7′S,9aS)-

Spiro[furan-2(3H),7′(6′H)-pyrrolo[1,2-c]pyrimidine]-1′,3′(2′H,5′H)-dione, 3,4-bis(acetyloxy)-5-[(acetyloxy)methyl]-4,5-dihydro-6′-phenyl-, (2R,3R,4R,5R,6′R)-

Spiro[furan-2(3H),7′(6′H)-pyrrolo[1,2-c]pyrimidine]-1′,3′(2′H,5′H)-dione, 3,4-bis(acetyloxy)-5-[(acetyloxy)methyl]-4,5-dihydro-6′-phenyl-, (2S,3R,4R,5R,6′S)-

Spiro[furan-2(3H),7′(6′H)-pyrrolo[1,2-c]pyrimidine]-1′,3′(2′H,5′H)-dione, 3,4-bis(acetyloxy)-5-[(acetyloxy)methyl]-4,5-dihydro-, (2R,3R,4R,5R)-

Spiro[furan-2(3H),7′(6′H)-pyrrolo[1,2-c]pyrimidine]-1′,3′(2′H,5′H)-dione, 3,4-bis[[(1,1-dimethylethyl)dimethylsilyl]oxy]-5-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-4,5-dihydro-6′-phenyl-, (2S,3R,4R,5R,6′R)-

Spiro[furan-2(3H),7′(6′H)-pyrrolo[1,2-c]pyrimidine]-1′,3′(2′H,5′H)-dione, 3,4-bis[[(1,1-dimethylethyl)dimethylsilyl]oxy]-5-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-4,5-dihydro-, (2R,3R,4R,5R)-

Spiro[furo[3,4-d]-1,3-dioxole-4(3aH),7′(6′H)-pyrrolo[1,2-c]pyrimidine]-1′,3′(2′H,5′H)-dione, 6-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-6,6a-dihydro-2,2-dimethyl-6′-phenyl-, (3aR,4R,6R,6′R,6aR)-

Spiro[furo[3,4-d]-1,3-dioxole-4(3aH),7′-pyrrolo[1,2-c]pyrimidine]-1′,3′(2′H)-dione, 6-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-6,6a-dihydro-2,2-dimethyl-, (3aR,4S,6R,6aR)-