| 1 | 291279-53-3 | 痛风平,ZYLOPRUNL | allopurinol | C5H4N4O
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| 2 | 68-94-0 | 次黄嘌呤 | Hypoxanthine | C5H4N4O
| 嘌呤;原料;试剂;核苷酸;中间体;标准品;对照品;医药原料;生化试剂;核苷酸类 | |
| 3 | | HYPROXANTHINE | HYPROXANTHINE | C5H4N4O
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| 4 | 56976-88-6 | 吡唑并[1,5-d][1,2,4]三嗪酮 | CAS:56976-88-6 | C5H4N4O
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| 5 | 2308-57-8 | 1,3-二氢-2H-嘌呤-2-酮 | 2-hydroxypurine | C5H4N4O
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| 6 | | HYPO XANTHINE-C13 | HYPO XANTHINE-C13 | C5H4N4O
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| 7 | 23431-04-1 | TRIAZOLOPYRIDINONE | Triazolopyridinone | C5H4N4O
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| 8 | 146469-95-6 | 3H-Purin-6-ol (9CI) | 3H-Purin-6-ol (9CI) | C5H4N4O
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| 9 | 1330265-04-7 | Hypoxanthine-13C2,15N | Hypoxanthine-13C2,15N | C5H4N4O
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| 10 | | 别嘌醇杂质E 标准品 | Allopurinol impurity E | C5H4N4O
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| 11 | | HYPOXANTHINE, [13C(U)]- | HYPOXANTHINE, [13C(U)]- | C5H4N4O
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| 12 | 28199-55-5 | 7H-Purine, 3-oxide (9CI) | 7H-Purine, 3-oxide (9CI) | C5H4N4O
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| 13 | | 4-AZIDO-1-PYRIDINIUMOLATE | 4-AZIDO-1-PYRIDINIUMOLATE | C5H4N4O
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| 14 | 23650-33-1 | 5-(2-FURANYL)-1H-TETRAZOLE | 5-(2-FURANYL)-1H-TETRAZOLE | C5H4N4O
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| 15 | 39968-33-7 | N-羟基-7-偶氮苯并三氮唑 | 1-Hydroxy-7-azabenzotriazole | C5H4N4O
| 芳烃;缩合剂;中间体;多肽耦合;缩合试剂;医药中间体;多肽偶联剂;保护氨基酸;化学生物学;肽键缩合剂 | |
| 16 | | PYRAZOLO(3,4-D)PYRIMIDIN-4-OL | PYRAZOLO(3,4-D)PYRIMIDIN-4-OL | C5H4N4O
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| 17 | 5372-23-6 | 4-氰基-5-咪唑甲酰胺 | 4-Cyanoimidazole-5-Carboxamide | C5H4N4O
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| 18 | 81411-79-2 | 异恶唑并[4,5-B]吡嗪-3-胺 | 3-AMINOISOXAZOLO[4,5-B]PYRAZINE | C5H4N4O
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| 19 | 916980-04-6 | 1,5-二氢-4H-吡唑并[3,4-D]嘧啶-4-酮 | 1H-pyrazolo[3,4-d]pyriMidin-4-ol | C5H4N4O
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| 20 | 1543119-63-6 | Isoxazolo[5,4-c]pyridazin-3-amine | Isoxazolo[5,4-c]pyridazin-3-amine | C5H4N4O
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| 21 | 315-30-0 | 别嘌醇 | 4-Hydroxypyrazolo[3,4-d]pyrimidine | C5H4N4O
| 嘧啶;痛风;化工;中间体;核酸类;原料药;化合物;标准品;别嘌醇;医药原料 | 医药;成品药 |
| 22 | 2704631-58-1 | 1,2,4]triazolo[1,5-a]pyrimidin-6-ol | 1,2,4]triazolo[1,5-a]pyrimidin-6-ol | C5H4N4O
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| 23 | 14384-66-8 | 4H,5H-[1,2,4]三唑并[1,5-A]嘧啶-5-酮 | [1,2,4]triazolo[1,5-a]pyrimidin-5-ol | C5H4N4O
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| 24 | 865444-76-4 | 3H-咪唑并[5,1-f][1,2,4]噻嗪-4-酮 | 3H-Imidazo[5,1-F][1,2,4]triazin-4-one | C5H4N4O
| 有机原料;酮类化合物 | |
| 25 | 1206825-06-0 | 3H,4H-咪唑并[2,1-F][1,2,4]三嗪-4-酮 | IMidazo[2,1-f][1,2,4]triazin-4(1H)-one | C5H4N4O
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| 26 | 54346-27-9 | 吡唑并[1,5-a][1,3,5]噻嗪-4(3H)-酮 | Pyrazolo[1,5-a][1,3,5]triazin-4(3H)-one | C5H4N4O
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| 27 | 76044-31-0 | 6H-[1,2,4]三唑并[1,5-c]嘧啶-5-酮 | 6H-[1,2,4]Triazolo[1,5-c]pyrimidin-5-one | C5H4N4O
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| 28 | 4866-61-9 | [1,2,4]三唑并[1,5-a]嘧啶-7-醇 | [1,2,4]TRIAZOLO[1,5-A]PYRIMIDIN-7(1H)-ONE | C5H4N4O
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| 29 | 109831-83-6 | 4-氨基-6-氧代-1,6-二氢-5-嘧啶甲腈 | 6-amino-4-oxo-1H-pyrimidine-5-carbonitrile | C5H4N4O
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| 30 | 31592-08-2 | 1H,7H-[1,2,4]triazolo[1,5-a]pyrimidin-7-one | 1H,7H-[1,2,4]triazolo[1,5-a]pyrimidin-7-one | C5H4N4O
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| 31 | 16328-63-5 | 1,3-二氢-2H-咪唑并[4,5-B]吡嗪-2-酮 | 2H-IMIDAZO[4,5-B]PYRAZIN-2-ONE, 1,3-DIHYDRO- | C5H4N4O
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| 32 | 13521-25-0 | 1H-吡唑并[3,4-D]吡嗪-4(5H)-酮 | 1,5-dihydro-4H-Pyrazolo[3,4-d]pyridazin-4-one | C5H4N4O
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| 33 | 13877-55-9 | 7-羟基吡唑并[4,3-D]嘧啶 | 7H-PYRAZOLO[4,3-D]PYRIMIDIN-7-ONE, 1,4-DIHYDRO- | C5H4N4O
| 双杂环;医药中间体 | |
| 34 | 185839-73-0 | 1H-1,2,3-Triazolo[4,5-c]pyridine,1-hydroxy-(9CI) | 1H-1,2,3-Triazolo[4,5-c]pyridine,1-hydroxy-(9CI) | C5H4N4O
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| 35 | 850474-61-2 | Pyrrolo[3,4-d]imidazol-4(1H)-one, 2-amino- (9CI) | Pyrrolo[3,4-d]imidazol-4(1H)-one, 2-amino- (9CI) | C5H4N4O
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| 36 | 51741-99-2 | Cyanamide, (1,4-dihydro-4-oxo-2-pyrimidinyl)- (9CI) | Cyanamide, (1,4-dihydro-4-oxo-2-pyrimidinyl)- (9CI) | C5H4N4O
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| 37 | 180749-06-8 | 4H-Pyrazolo[3,4-d]pyrimidin-4-one, 1,7-dihydro- (9CI) | 4H-Pyrazolo[3,4-d]pyrimidin-4-one, 1,7-dihydro- (9CI) | C5H4N4O
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| 38 | 179042-24-1 | 7H-Pyrazolo[4,3-d]pyrimidin-7-one, 1,7a-dihydro- (9CI) | 7H-Pyrazolo[4,3-d]pyrimidin-7-one, 1,7a-dihydro- (9CI) | C5H4N4O
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| 39 | 371203-93-9 | 4-Pyrimidinecarbonitrile, 5-amino-1,2-dihydro-2-oxo- (9CI) | 4-Pyrimidinecarbonitrile, 5-amino-1,2-dihydro-2-oxo- (9CI) | C5H4N4O
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| 40 | 27058-50-0 | 2-氨基-4-氧代-1,4-二氢嘧啶-5-甲腈 | 5-Pyrimidinecarbonitrile, 2-amino-1,4-dihydro-4-oxo- (8CI,9CI) | C5H4N4O
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| 41 | 921603-67-0 | | Methanimidamide, N-(4-carbonyl-2,4-dihydro-3H-pyrazol-3-ylidene)- | C5H4N4O
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