核苷是糖胺，可以被認(rèn)為是不含磷酸基的核苷酸。核苷由一個(gè)核苷酸(也稱為氮基)和一個(gè)五碳糖(核糖或脫氧核糖)組成，而核苷酸由一個(gè)核苷酸、一個(gè)五碳糖和一個(gè)或多個(gè)磷酸基組成。在核苷中，堿基通過(guò)-糖苷鍵與核糖或脫氧核糖結(jié)合。核苷酸是有機(jī)分子，是構(gòu)成核酸聚合物的單體單位，脫氧核糖核酸(DNA)和核糖核酸(RNA)，兩者都是地球上所有生命形式中必不可少的生物分子。核苷酸是核酸的基本組成部分;它們由三個(gè)亞基分子組成:一個(gè)氮基、一個(gè)五碳糖(核糖或脫氧核糖)和至少一個(gè)磷酸基。核苷是含氮的堿和5碳的糖。因此，一個(gè)核苷加上一個(gè)磷酸基產(chǎn)生一個(gè)核苷酸。
1-((2R,3R,4S,5R)-3,4-Dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-4-thioxo-3,4-dihydropyrimidin-2(1H)-one
(2R,3R,4R,5R)-2-(Acetoxymethyl)-5-(2-amino-6-chloro-9H-purin-9-yl)tetrahydrofuran-3,4-diyl diacetate
(2R,3S,4S,5R)-2-(6-Amino-9H-purin-9-yl)-4-fluoro-5-(hydroxymethyl)tetrahydrofuran-3-ol
(2R,3S,5R)-5-(6-Amino-9H-purin-9-yl)-2-(hydroxymethyl)tetrahydrofuran-3-ol hydrate
1-((2R,4S,5R)-4-Hydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-5-(hydroxymethyl)pyrimidine-2,4(1H,3H)-dione
(2R,3R,4R,5R)-2-(4-Amino-7H-pyrrolo[2,3-d]pyrimidin-7-yl)-5-(hydroxymethyl)-3-methyltetrahydrofuran-3,4-diol
N-(1-((2R,4S,5R)-4-Hydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-2-oxo-1,2-dihydropyrimidin-4-yl)isobutyramide
6-Amino-1,3,5-triazin-2(1H)-one
1-((2R,3R,4S,5R)-3,4-Dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-5-(hydroxymethyl)pyrimidine-2,4(1H,3H)-dione
1-((2R,3R,4S,5R)-3,4-Dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-5-ethylpyrimidine-2,4(1H,3H)-dione
5-(Hydroxymethyl)-1-((3aR,4R,6R,6aR)-6-(hydroxymethyl)-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl)pyrimidine-2,4(1H,3H)-dione
(2R,3R,4R,5R)-2-(6-Amino-9H-purin-9-yl)-5-(hydroxymethyl)-3-methyltetrahydrofuran-3,4-diol
2-Amino-9-((2R,3R,4S,5R)-3-hydroxy-5-(hydroxymethyl)-4-methoxytetrahydrofuran-2-yl)-1,9-dihydro-6H-purin-6-one
5-Bromo-1-((2R,3R,4R,5R)-3-fluoro-4-hydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)pyrimidine-2,4(1H,3H)-dione
1-((2R,4S,5R)-4-((tert-Butyldimethylsilyl)oxy)-5-(hydroxymethyl)tetrahydrofuran-2-yl)-5-methylpyrimidine-2,4(1H,3H)-dione
1-((2R,3R,4R,5R)-4-((tert-Butyldimethylsilyl)oxy)-5-(hydroxymethyl)-3-methoxytetrahydrofuran-2-yl)pyrimidine-2,4(1H,3H)-dione
1-((2R,3R,4R,5R)-4-Hydroxy-5-(hydroxymethyl)-3-methoxytetrahydrofuran-2-yl)-4-(methylamino)pyrimidin-2(1H)-one
N-(9-((2R,3S,4S,5R)-3,4-Dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-9H-purin-6-yl)benzamide
1-((3AR,4R,6R,6aR)-6-(hydroxymethyl)-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl)pyrimidine-2,4(1H,3H)-dione
Adenosine-5'-diphosphate trilithium salt
Sodium ((2R,3S,4R,5R)-3,4-dihydroxy-5-(6-hydroxy-9H-purin-9-yl)tetrahydrofuran-2-yl)methyl hydrogen diphosphate
1-((2R,3R,4R,5R)-4-Hydroxy-5-(hydroxymethyl)-3-(2-methoxyethoxy)tetrahydrofuran-2-yl)pyrimidine-2,4(1H,3H)-dione
4-Amino-1-((2R,3R,4R,5R)-4-hydroxy-5-(hydroxymethyl)-3-(2-methoxyethoxy)tetrahydrofuran-2-yl)pyrimidin-2(1H)-one
2-Amino-9-((2R,3R,4R,5R)-4-hydroxy-5-(hydroxymethyl)-3-(2-methoxyethoxy)tetrahydrofuran-2-yl)-3H-purin-6(9H)-one
1-((2R,3R,4R,5R)-4-Hydroxy-5-(hydroxymethyl)-3-(2-methoxyethoxy)tetrahydrofuran-2-yl)-5-methylpyrimidine-2,4(1H,3H)-dione
(2R,3R,4R,5R)-5-(6-Amino-9H-purin-9-yl)-2-(hydroxymethyl)-4-(2-methoxyethoxy)tetrahydrofuran-3-ol
9-((3aR,4R,6R,6aR)-6-(Aminomethyl)-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl)-9H-purin-6-amine
5-Amino-1-((2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)pyrimidine-2,4(1H,3H)-dione
1-((2R,4S,5S)-4-Amino-5-(hydroxymethyl)tetrahydrofuran-2-yl)-5-methylpyrimidine-2,4(1H,3H)-dione
N4-Benzoylcytidine
