N′-[1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-1,4-dihydro-5-methyl-4-oxo-2-pyrimidinyl]-N,N-dimethylmethanimidamide

N,N-Dibutyl-N′-[1-(2-deoxy-β-D-erythro-pentofuranosyl)-1,4-dihydro-5-methyl-4-oxo-2-pyrimidinyl]methanimidamide

N′-[1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-3-O-(hydroxyphosphinyl)-β-D-erythro-pentofuranosyl]-1,4-dihydro-5-methyl-4-oxo-2-pyrimidinyl]-N,N-dimethylmethanimidamide

N′-[1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-1,4-dihydro-5-methyl-4-oxo-2-pyrimidinyl]-N,N-dimethylmethanimidamide

1-[3-O-[Bis(4-methoxyphenyl)phenylmethyl]-5-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-α-D-erythro-pentofuranosyl]-5-methyl-4-[(4-phenoxyphenyl)amino]-2(1H)-pyrimidinone

1-[3-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-α-D-erythro-pentofuranosyl]-5-methyl-4-[(4-phenoxyphenyl)amino]-2(1H)-pyrimidinone

1-[5-O-Acetyl-3-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-α-D-erythro-pentofuranosyl]-5-methyl-4-[(4-phenoxyphenyl)amino]-2(1H)-pyrimidinone

1-[5-O-Acetyl-3-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-α-D-erythro-pentofuranosyl]-1,2-dihydro-5-methyl-2-oxo-4-pyrimidinyl 2,4,6-trimethylbenzenesulfonate

1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-α-D-erythro-pentofuranosyl]-4-(9H-fluoren-2-ylamino)-5-methyl-2(1H)-pyrimidinone

1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-α-D-erythro-pentofuranosyl]-4-(9H-fluoren-2-ylamino)-5-methyl-2(1H)-pyrimidinone

1-[3-O-Acetyl-5-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-α-D-erythro-pentofuranosyl]-4-(9H-fluoren-2-ylamino)-5-methyl-2(1H)-pyrimidinone

1-[3-O-Acetyl-5-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-α-D-erythro-pentofuranosyl]-1,2-dihydro-5-methyl-2-oxo-4-pyrimidinyl 2,4,6-trimethylbenzenesulfonate

Cytidine, 2′-deoxy-N-9H-fluoren-2-yl-5-methyl-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-5-methyl-N-[2-(phenylamino)phenyl]-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite]

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-5-methyl-N-[2-(phenylmethyl)phenyl]-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite]

Cytidine, 2′-deoxy-5-methyl-N-[2-(phenylamino)phenyl]-

Cytidine, 2′-deoxy-5-methyl-N-[2-(phenylmethyl)phenyl]-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-N-9H-fluoren-2-yl-5-methyl-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite]

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-5-methyl-N-[2-(phenylamino)phenyl]-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-5-methyl-N-[2-(phenylmethyl)phenyl]-