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核苷、核苷酸和类似物

中文名称 英文名称 CAS号 化学式 结构式图片
—— [[1-[(2R,4S,5R)-3-fluoro-4-hydroxy-5-(hydroxymethyl)-3-methyloxolan-2-yl]-2-oxopyrimidin-4-yl]amino] octanoate —— C18H28FN3O6
[[1-[(2R,4S,5R)-3-fluoro-4-hydroxy-5-(hydroxymethyl)-3-methyloxolan-2-yl]-2-oxopyrimidin-4-yl]amino] octanoate
—— US10874683, Example 56.5 —— C10H15N3O6
US10874683, Example 56.5
—— ethyl (2S)-2-[[1-[(2S,3R,4R)-5-(4-aminopyrrolo[2,3-d]pyrimidin-7-yl)-3,4-dihydroxy-4-methyloxolan-2-yl]ethoxy-phenoxyphosphoryl]amino]propanoate —— C24H32N5O8P
ethyl (2S)-2-[[1-[(2S,3R,4R)-5-(4-aminopyrrolo[2,3-d]pyrimidin-7-yl)-3,4-dihydroxy-4-methyloxolan-2-yl]ethoxy-phenoxyphosphoryl]amino]propanoate
—— (3S,4R,5R)-2-(4-aminobenzimidazol-1-yl)-5-(hydroxymethyl)-2-methyloxolane-3,4-diol —— C13H17N3O4
(3S,4R,5R)-2-(4-aminobenzimidazol-1-yl)-5-(hydroxymethyl)-2-methyloxolane-3,4-diol
—— N-[1-[(2R,5R)-3,3-difluoro-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]-2-oxopyrimidin-4-yl]-4-phenylbutanamide —— C19H21F2N3O5
N-[1-[(2R,5R)-3,3-difluoro-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]-2-oxopyrimidin-4-yl]-4-phenylbutanamide
—— N-[1-[(2R,5R)-3,3-difluoro-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]-2-oxopyrimidin-4-yl]butanamide —— C13H17F2N3O5
N-[1-[(2R,5R)-3,3-difluoro-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]-2-oxopyrimidin-4-yl]butanamide
—— [(1R)-1-[(3aR,4R,6S,6aR)-4-(4-aminopyrrolo[2,3-d]pyrimidin-7-yl)-2,2,3a-trimethyl-6,6a-dihydro-4H-furo[3,4-d][1,3]dioxol-6-yl]ethyl] 2-cyanoethyl hydrogen phosphate —— C19H26N5O7P
[(1R)-1-[(3aR,4R,6S,6aR)-4-(4-aminopyrrolo[2,3-d]pyrimidin-7-yl)-2,2,3a-trimethyl-6,6a-dihydro-4H-furo[3,4-d][1,3]dioxol-6-yl]ethyl] 2-cyanoethyl hydrogen phosphate
—— N-[7-[(3aR,4R,6R,6aR)-6-(1-hydroxyethyl)-2,2,3a-trimethyl-6,6a-dihydro-4H-furo[3,4-d][1,3]dioxol-4-yl]pyrrolo[2,3-d]pyrimidin-4-yl]benzamide 1417564-01-2 C23H26N4O5
N-[7-[(3aR,4R,6R,6aR)-6-(1-hydroxyethyl)-2,2,3a-trimethyl-6,6a-dihydro-4H-furo[3,4-d][1,3]dioxol-4-yl]pyrrolo[2,3-d]pyrimidin-4-yl]benzamide
—— [(1S)-1-[(3aR,4R,6S,6aR)-4-(4-aminopyrrolo[2,3-d]pyrimidin-7-yl)-2,2,3a-trimethyl-6,6a-dihydro-4H-furo[3,4-d][1,3]dioxol-6-yl]ethyl] dihydrogen phosphate —— C16H23N4O7P
[(1S)-1-[(3aR,4R,6S,6aR)-4-(4-aminopyrrolo[2,3-d]pyrimidin-7-yl)-2,2,3a-trimethyl-6,6a-dihydro-4H-furo[3,4-d][1,3]dioxol-6-yl]ethyl] dihydrogen phosphate
—— methyl (2S)-2-[[[(1S)-1-[(2S,3R,4R,5R)-5-(4-amino-5-fluoropyrrolo[2,3-d]pyrimidin-7-yl)-3,4-dihydroxy-4-methyloxolan-2-yl]ethoxy]-phenoxyphosphoryl]amino]propanoate 1417563-30-4 C23H29FN5O8P
methyl (2S)-2-[[[(1S)-1-[(2S,3R,4R,5R)-5-(4-amino-5-fluoropyrrolo[2,3-d]pyrimidin-7-yl)-3,4-dihydroxy-4-methyloxolan-2-yl]ethoxy]-phenoxyphosphoryl]amino]propanoate
—— N-[7-[(2R,3R,4R,5R)-3,4-dihydroxy-5-(hydroxymethyl)-3-methyloxolan-2-yl]pyrrolo[2,3-d]pyrimidin-4-yl]benzamide 1417563-98-4 C19H20N4O5
N-[7-[(2R,3R,4R,5R)-3,4-dihydroxy-5-(hydroxymethyl)-3-methyloxolan-2-yl]pyrrolo[2,3-d]pyrimidin-4-yl]benzamide
—— 6-aminohexyl [(2R,3S,5R)-5-(2-amino-6-oxo-1H-purin-9-yl)-3-methoxyoxolan-2-yl]methyl hydrogen phosphate —— C17H29N6O7P
6-aminohexyl [(2R,3S,5R)-5-(2-amino-6-oxo-1H-purin-9-yl)-3-methoxyoxolan-2-yl]methyl hydrogen phosphate
—— (2R,3R,4R,5R)-2-(4-amino-5-fluoropyrrolo[2,3-d]pyrimidin-7-yl)-5-[(1R)-1-hydroxyethyl]-3-methyloxolane-3,4-diol 1417563-20-2 C13H17FN4O4
(2R,3R,4R,5R)-2-(4-amino-5-fluoropyrrolo[2,3-d]pyrimidin-7-yl)-5-[(1R)-1-hydroxyethyl]-3-methyloxolane-3,4-diol
—— butyl (2S)-2-[[[(1R)-1-[(2S,3R,4R,5R)-5-(5-fluoro-4-methylpyrrolo[2,3-d]pyrimidin-7-yl)-3,4-dihydroxy-4-methyloxolan-2-yl]ethoxy]-naphthalen-1-yloxyphosphoryl]amino]propanoate —— C31H38FN4O8P
butyl (2S)-2-[[[(1R)-1-[(2S,3R,4R,5R)-5-(5-fluoro-4-methylpyrrolo[2,3-d]pyrimidin-7-yl)-3,4-dihydroxy-4-methyloxolan-2-yl]ethoxy]-naphthalen-1-yloxyphosphoryl]amino]propanoate
—— (2R,3R,4R,5R)-2-(4-Amino-7H-pyrrolo[2,3-d]pyrimidin-7-yl)-5-((S)-1-hydroxyethyl)-3-methyltetrahydrofuran-3,4-diol 1417563-45-1 C13H18N4O4
(2R,3R,4R,5R)-2-(4-Amino-7H-pyrrolo[2,3-d]pyrimidin-7-yl)-5-((S)-1-hydroxyethyl)-3-methyltetrahydrofuran-3,4-diol
—— [(2R,3R,5R)-2-[(6-chloro-2-oxo-4H-1,3,2lambda5-benzodioxaphosphinin-2-yl)oxymethyl]-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-3-yl] 4-(ethylamino)-4-oxobutanoate —— C23H27ClN3O10P
[(2R,3R,5R)-2-[(6-chloro-2-oxo-4H-1,3,2lambda5-benzodioxaphosphinin-2-yl)oxymethyl]-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-3-yl] 4-(ethylamino)-4-oxobutanoate
—— 5-[(E)-2-cyclohexylethenyl]-1-[(4R,5R)-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]pyrimidine-2,4-dione —— C17H24N2O5
5-[(E)-2-cyclohexylethenyl]-1-[(4R,5R)-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]pyrimidine-2,4-dione
—— (4R,5R)-2-(2,6-diaminopurin-9-yl)-4-methoxy-5-(methoxymethyl)oxolan-3-ol —— C12H18N6O4
(4R,5R)-2-(2,6-diaminopurin-9-yl)-4-methoxy-5-(methoxymethyl)oxolan-3-ol
—— 6-[[3-[[1-[4-Hydroxy-5-[[hydroxy-[hydroxy(phosphonooxy)phosphoryl]oxyphosphoryl]oxymethyl]oxolan-2-yl]-2-oxopyrimidin-4-yl]amino]-3-oxopropyl]disulfanyl]hexanoic acid —— C18H30N3O16P3S2
6-[[3-[[1-[4-Hydroxy-5-[[hydroxy-[hydroxy(phosphonooxy)phosphoryl]oxyphosphoryl]oxymethyl]oxolan-2-yl]-2-oxopyrimidin-4-yl]amino]-3-oxopropyl]disulfanyl]hexanoic acid
—— 1-[6-[2-[[3-[2-Azido-2-[2-[2-[3-[1-[4-(azidomethoxy)-5-[[hydroxy-[hydroxy(phosphonooxy)phosphoryl]oxyphosphoryl]oxymethyl]oxolan-2-yl]-2,4-dioxopyrimidin-5-yl]prop-2-ynylamino]-2-oxoethoxy]ethoxy]ethoxy]benzoyl]amino]ethylamino]-6-oxohexyl]-3,3-dimethyl-2-[3-[3-methyl-1-phenyl-3-(4-sulfobutyl)indol-2-ylidene]prop-1-enyl]indol-1-ium-5-sulfonic acid —— C66H81N13O26P3S2+
1-[6-[2-[[3-[2-Azido-2-[2-[2-[3-[1-[4-(azidomethoxy)-5-[[hydroxy-[hydroxy(phosphonooxy)phosphoryl]oxyphosphoryl]oxymethyl]oxolan-2-yl]-2,4-dioxopyrimidin-5-yl]prop-2-ynylamino]-2-oxoethoxy]ethoxy]ethoxy]benzoyl]amino]ethylamino]-6-oxohexyl]-3,3-dimethyl-2-[3-[3-methyl-1-phenyl-3-(4-sulfobutyl)indol-2-ylidene]prop-1-enyl]indol-1-ium-5-sulfonic acid
—— [[5-(6-Aminopurin-9-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-hydroxyphosphoryl] (5-methylpyrrolidin-2-yl)methyl hydrogen phosphate —— C16H26N6O10P2
[[5-(6-Aminopurin-9-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-hydroxyphosphoryl] (5-methylpyrrolidin-2-yl)methyl hydrogen phosphate
—— HO(-5)Ribf3P(b)-cytosin-1-yl —— C9H14N3O9P
HO(-5)Ribf3P(b)-cytosin-1-yl
—— 1-[(2R,3S,4R,5R)-3-fluoro-4-hydroxy-5-(hydroxymethyl)-3-methyloxolan-2-yl]-4-(hydroxyamino)pyrimidin-2-one —— C10H14FN3O5
1-[(2R,3S,4R,5R)-3-fluoro-4-hydroxy-5-(hydroxymethyl)-3-methyloxolan-2-yl]-4-(hydroxyamino)pyrimidin-2-one
—— 9-[(2R,3R,4R,5R)-3,4-bis[[tert-butyl(dimethyl)silyl]oxy]-5-[[tert-butyl(dimethyl)silyl]oxymethyl]oxolan-2-yl]-6-(2-phenylsulfanylethyl)purin-2-amine —— C36H63N5O4SSi3
9-[(2R,3R,4R,5R)-3,4-bis[[tert-butyl(dimethyl)silyl]oxy]-5-[[tert-butyl(dimethyl)silyl]oxymethyl]oxolan-2-yl]-6-(2-phenylsulfanylethyl)purin-2-amine
—— 2-[[[(2R,3R,4R,5R)-4-fluoro-3-hydroxy-4-methyl-5-[2-oxo-4-(phenylmethoxyamino)pyrimidin-1-yl]oxolan-2-yl]methoxy-phenoxyphosphoryl]amino]propanoic acid —— C26H30FN4O9P
2-[[[(2R,3R,4R,5R)-4-fluoro-3-hydroxy-4-methyl-5-[2-oxo-4-(phenylmethoxyamino)pyrimidin-1-yl]oxolan-2-yl]methoxy-phenoxyphosphoryl]amino]propanoic acid
—— [(2S,3R,4R,5R,6R)-3-acetamido-2,5-dihydroxy-6-(sulfooxymethyl)oxan-4-yl] [(2R,3S,4R,5R)-5-(2,4-dioxopyrimidin-1-yl)-3,4-dihydroxyoxolan-2-yl]methyl phosphono phosphate —— C17H27N3O20P2S
[(2S,3R,4R,5R,6R)-3-acetamido-2,5-dihydroxy-6-(sulfooxymethyl)oxan-4-yl] [(2R,3S,4R,5R)-5-(2,4-dioxopyrimidin-1-yl)-3,4-dihydroxyoxolan-2-yl]methyl phosphono phosphate
—— propan-2-yl (2S)-2-[[[(2R,4R,5R)-5-(2,4-dioxopyrimidin-1-yl)-4-fluoro-3-hydroxy-4-methyloxolan-2-yl]methoxy-phenoxyphosphoryl]amino]propanoate —— C22H29FN3O9P
propan-2-yl (2S)-2-[[[(2R,4R,5R)-5-(2,4-dioxopyrimidin-1-yl)-4-fluoro-3-hydroxy-4-methyloxolan-2-yl]methoxy-phenoxyphosphoryl]amino]propanoate
—— (E)-3-[4-amino-1-[(2R,4S,5R)-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]-2-oxopyrimidin-5-yl]prop-2-enamide —— C12H16N4O5
(E)-3-[4-amino-1-[(2R,4S,5R)-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]-2-oxopyrimidin-5-yl]prop-2-enamide
—— 2-cyanoethyl [(2R,3R,4R,5R)-5-(2,4-dioxopyrimidin-1-yl)-4-fluoro-3-hydroxy-4-methyloxolan-2-yl]methyl 3-hexadecoxypropyl phosphite —— C32H55FN3O8P
2-cyanoethyl [(2R,3R,4R,5R)-5-(2,4-dioxopyrimidin-1-yl)-4-fluoro-3-hydroxy-4-methyloxolan-2-yl]methyl 3-hexadecoxypropyl phosphite
—— [[(2R,4S,5R)-5-(6-aminopurin-9-yl)-4-fluoro-3-hydroxyoxolan-2-yl]methoxy-hydroxyphosphoryl] phosphono hydrogen phosphate —— C10H15FN5O12P3
[[(2R,4S,5R)-5-(6-aminopurin-9-yl)-4-fluoro-3-hydroxyoxolan-2-yl]methoxy-hydroxyphosphoryl] phosphono hydrogen phosphate
—— 4-amino-1-[(2R,3S,5R)-4-butoxy-5-(butoxymethyl)-3-fluorooxolan-2-yl]-5-(butoxymethyl)pyrimidin-2-one —— C22H38FN3O5
4-amino-1-[(2R,3S,5R)-4-butoxy-5-(butoxymethyl)-3-fluorooxolan-2-yl]-5-(butoxymethyl)pyrimidin-2-one
—— P-P-P-Ura-3dAraf2F —— C9H14FN2O13P3
P-P-P-Ura-3dAraf2F
—— [[(2R,4S,5R)-5-(6-aminopurin-9-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-[(2R,3S,4S)-5-(7,8-dimethyl-2,4-dioxobenzo[g]pteridin-10-yl)-2,3,4-trihydroxypentoxy]-oxophosphanium —— C27H32N9O14P2+
[[(2R,4S,5R)-5-(6-aminopurin-9-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-[(2R,3S,4S)-5-(7,8-dimethyl-2,4-dioxobenzo[g]pteridin-10-yl)-2,3,4-trihydroxypentoxy]-oxophosphanium
—— 1-[(2R,3R,4R,5R)-3-benzyl-3,4-dihydroxy-2,5-bis(hydroxymethyl)oxolan-2-yl]pyrimidine-2,4-dione —— C17H20N2O7
1-[(2R,3R,4R,5R)-3-benzyl-3,4-dihydroxy-2,5-bis(hydroxymethyl)oxolan-2-yl]pyrimidine-2,4-dione
—— 1-[(2R,3S,5R)-4-hydroxy-5-(hydroxymethyl)-3-naphthalen-1-yloxyoxolan-2-yl]pyrimidine-2,4-dione —— C19H18N2O6
1-[(2R,3S,5R)-4-hydroxy-5-(hydroxymethyl)-3-naphthalen-1-yloxyoxolan-2-yl]pyrimidine-2,4-dione
—— [(2R,3R)-5-(6-aminopurin-9-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-N-methylphosphonamidic acid —— C11H17N6O6P
[(2R,3R)-5-(6-aminopurin-9-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-N-methylphosphonamidic acid
—— [(2S)-1-[(2R,3S,4R,5S)-5-(1,3-dimethyl-2,4-dioxopyrimidin-5-yl)-3,4-dihydroxyoxolan-2-yl]-2-fluorobutan-2-yl]oxy-[(2R)-2-hydroxybutan-2-yl]phosphinic acid —— C18H30FN2O9P
[(2S)-1-[(2R,3S,4R,5S)-5-(1,3-dimethyl-2,4-dioxopyrimidin-5-yl)-3,4-dihydroxyoxolan-2-yl]-2-fluorobutan-2-yl]oxy-[(2R)-2-hydroxybutan-2-yl]phosphinic acid
—— (2S,3R,5R)-5-(6-aminopurin-9-yl)-2-(methylsulfanylmethyl)oxolan-3-ol —— C11H15N5O2S
(2S,3R,5R)-5-(6-aminopurin-9-yl)-2-(methylsulfanylmethyl)oxolan-3-ol
—— (2R,5R)-5-(6-aminopurin-9-yl)-2-(hydroxymethyl)-4-(pyren-1-ylmethoxy)oxolan-3-ol —— C27H23N5O4
(2R,5R)-5-(6-aminopurin-9-yl)-2-(hydroxymethyl)-4-(pyren-1-ylmethoxy)oxolan-3-ol
—— ethyl 3-[[(4R)-2-[[(2R,4R,5R)-5-(2,6-diaminopurin-9-yl)-3,4-dihydroxy-4-methyloxolan-2-yl]methoxy]-5,5-dimethyl-2-oxo-1,3,2lambda5-dioxaphosphinane-4-carbonyl]amino]propanoate —— C22H34N7O10P
ethyl 3-[[(4R)-2-[[(2R,4R,5R)-5-(2,6-diaminopurin-9-yl)-3,4-dihydroxy-4-methyloxolan-2-yl]methoxy]-5,5-dimethyl-2-oxo-1,3,2lambda5-dioxaphosphinane-4-carbonyl]amino]propanoate
—— ethyl 3-[2-[[(2R,4R,5R)-5-(2,6-diaminopurin-9-yl)-3,4-dihydroxy-4-methyloxolan-2-yl]methoxy-[2-(3-ethoxy-3-oxopropyl)phenoxy]phosphoryl]oxyphenyl]propanoate —— C33H41N6O11P
ethyl 3-[2-[[(2R,4R,5R)-5-(2,6-diaminopurin-9-yl)-3,4-dihydroxy-4-methyloxolan-2-yl]methoxy-[2-(3-ethoxy-3-oxopropyl)phenoxy]phosphoryl]oxyphenyl]propanoate
—— [(2R,4R,5R)-5-[2-amino-6-(phenylmethoxycarbonylamino)purin-9-yl]-4-fluoro-2-(hydroxymethyl)-4-methyloxolan-3-yl] benzyl carbonate —— C27H27FN6O7
[(2R,4R,5R)-5-[2-amino-6-(phenylmethoxycarbonylamino)purin-9-yl]-4-fluoro-2-(hydroxymethyl)-4-methyloxolan-3-yl] benzyl carbonate
—— (2R,4S,5R)-2-(2-amino-6-chloropurin-9-yl)-5-(hydroxymethyl)-3-methyloxolane-3,4-diol —— C11H14ClN5O4
(2R,4S,5R)-2-(2-amino-6-chloropurin-9-yl)-5-(hydroxymethyl)-3-methyloxolane-3,4-diol
—— (4R)-2-[[(2R,3S,5R)-5-(2,6-diaminopurin-9-yl)-3,4-dihydroxy-4-methyloxolan-2-yl]methoxy]-5,5-dimethyl-2-oxo-N-(3-oxobutyl)-1,3,2lambda5-dioxaphosphinane-4-carboxamide —— C21H32N7O9P
(4R)-2-[[(2R,3S,5R)-5-(2,6-diaminopurin-9-yl)-3,4-dihydroxy-4-methyloxolan-2-yl]methoxy]-5,5-dimethyl-2-oxo-N-(3-oxobutyl)-1,3,2lambda5-dioxaphosphinane-4-carboxamide
—— [[(2R,3S,5R)-5-(2,6-diaminopurin-9-yl)-3,4-dihydroxy-4-methyloxolan-2-yl]methoxy-hydroxyphosphoryl] phosphono hydrogen phosphate —— C11H19N6O13P3
[[(2R,3S,5R)-5-(2,6-diaminopurin-9-yl)-3,4-dihydroxy-4-methyloxolan-2-yl]methoxy-hydroxyphosphoryl] phosphono hydrogen phosphate
—— [(2R,3S,5R)-4-benzoyloxy-5-[2,6-bis[bis[(2-methylpropan-2-yl)oxycarbonyl]amino]purin-9-yl]-2-ethyl-4-methyloxolan-3-yl] benzoate —— C46H58N6O13
[(2R,3S,5R)-4-benzoyloxy-5-[2,6-bis[bis[(2-methylpropan-2-yl)oxycarbonyl]amino]purin-9-yl]-2-ethyl-4-methyloxolan-3-yl] benzoate
—— tert-butyl N-[2-[bis[(2-methylpropan-2-yl)oxycarbonyl]amino]-9-[(2R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)-3-methyloxolan-2-yl]purin-6-yl]-N-[(2-methylpropan-2-yl)oxycarbonyl]carbamate —— C31H48N6O12
tert-butyl N-[2-[bis[(2-methylpropan-2-yl)oxycarbonyl]amino]-9-[(2R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)-3-methyloxolan-2-yl]purin-6-yl]-N-[(2-methylpropan-2-yl)oxycarbonyl]carbamate
—— [(2R,3S,5R)-4-benzoyloxy-5-(2,6-diaminopurin-9-yl)-2-ethyl-4-methyloxolan-3-yl] benzoate —— C26H26N6O5
[(2R,3S,5R)-4-benzoyloxy-5-(2,6-diaminopurin-9-yl)-2-ethyl-4-methyloxolan-3-yl] benzoate
—— (7aS)-6-[6-amino-8-(4-fluorophenyl)purin-9-yl]-2-hydroxy-2-sulfanylidene-4a,6,7,7a-tetrahydro-4H-furo[3,2-d][1,3,2]dioxaphosphinin-7-ol —— C16H15FN5O5PS
(7aS)-6-[6-amino-8-(4-fluorophenyl)purin-9-yl]-2-hydroxy-2-sulfanylidene-4a,6,7,7a-tetrahydro-4H-furo[3,2-d][1,3,2]dioxaphosphinin-7-ol
—— (7aR)-6-(6-amino-8-phenylpurin-9-yl)-2-hydroxy-2-sulfanylidene-4a,6,7,7a-tetrahydro-4H-furo[3,2-d][1,3,2]dioxaphosphinin-7-ol —— C16H16N5O5PS
(7aR)-6-(6-amino-8-phenylpurin-9-yl)-2-hydroxy-2-sulfanylidene-4a,6,7,7a-tetrahydro-4H-furo[3,2-d][1,3,2]dioxaphosphinin-7-ol