N′-[1-[2,5-Anhydro-4-C-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-3-O-[(S)-[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-α-L-lyxofuranosyl]-1H-pyrazolo[3,4-d]pyrimidin-4-yl]-N,N-dimethylethanimidamide

N′-[1-[2,5-Anhydro-4-C-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-3-O-[(R)-[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-α-L-lyxofuranosyl]-1H-pyrazolo[3,4-d]pyrimidin-4-yl]-N,N-dimethylethanimidamide

N′-[1-[2,5-Anhydro-4-C-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-α-L-lyxofuranosyl]-1H-pyrazolo[3,4-d]pyrimidin-4-yl]-N,N-dimethylethanimidamide

1-[2,5-Anhydro-4-C-[(phenylmethoxy)methyl]-3-O-(phenylmethyl)-α-L-lyxofuranosyl]-6-chloro-1H-pyrazolo[3,4-d]pyrimidin-4-amine

N′-[7-[2,5-Anhydro-4-C-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-3-O-[(S)-[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-α-L-lyxofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-yl]-N,N-dimethylethanimidamide

N′-[7-[2,5-Anhydro-4-C-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-3-O-[(R)-[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-α-L-lyxofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-yl]-N,N-dimethylethanimidamide

N′-[7-[2,5-Anhydro-4-C-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-α-L-lyxofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-yl]-N,N-dimethylethanimidamide

7-[2,5-Anhydro-4-C-(hydroxymethyl)-α-L-lyxofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine

7-[2,5-Anhydro-4-C-[(phenylmethoxy)methyl]-3-O-(phenylmethyl)-α-L-lyxofuranosyl]-5-iodo-7H-pyrrolo[2,3-d]pyrimidin-4-amine

7-[2-O-Acetyl-5-O-[(4-methylphenyl)sulfonyl]-4-C-[(phenylmethoxy)methyl]-3-O-(phenylmethyl)-α-L-lyxofuranosyl]-4-chloro-5-iodo-7H-pyrrolo[2,3-d]pyrimidine

N′-[1-[2,5-Anhydro-4-C-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-3-O-[(S)-[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-α-L-lyxofuranosyl]-4,5-dihydro-4-oxo-1H-pyrazolo[3,4-d]pyrimidin-6-yl]-N,N-dimethylmethanimidamide

N′-[1-[2,5-Anhydro-4-C-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-3-O-[(R)-[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-α-L-lyxofuranosyl]-4,5-dihydro-4-oxo-1H-pyrazolo[3,4-d]pyrimidin-6-yl]-N,N-dimethylmethanimidamide

N′-[1-[2,5-Anhydro-4-C-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-α-L-lyxofuranosyl]-4,5-dihydro-4-oxo-1H-pyrazolo[3,4-d]pyrimidin-6-yl]-N,N-dimethylmethanimidamide

6-Amino-1-[2,5-anhydro-4-C-(hydroxymethyl)-α-L-lyxofuranosyl]-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one

6-Amino-1-[2,5-anhydro-4-C-[(phenylmethoxy)methyl]-3-O-(phenylmethyl)-α-L-lyxofuranosyl]-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one

1-[2,5-Anhydro-4-C-[(phenylmethoxy)methyl]-3-O-(phenylmethyl)-α-L-lyxofuranosyl]-6-chloro-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one

1-[2-O-Acetyl-5-O-[(4-methylphenyl)sulfonyl]-4-C-[(phenylmethoxy)methyl]-3-O-(phenylmethyl)-α-L-lyxofuranosyl]-4,6-dichloro-1H-pyrazolo[3,4-d]pyrimidine