| 1 | 1122-61-8 | 4-硝基吡啶 | 4-Nitropyridine | C5H4N2O2
| 吡啶;硝基吡啶 | |
| 2 | 2164-61-6 | 3-羧基哒嗪 | 3-CARBOXYPYRIDAZINE | C5H4N2O2
| 杂环;哒嗪;药物中间体 | |
| 3 | | 4-NITROSOPYRIDINE1-OXIDE | 4-NITROSOPYRIDINE1-OXIDE | C5H4N2O2
| | |
| 4 | 98-97-5 | 吡嗪-2-羧酸 | 2-Pyrazinecarboxylic acid | C5H4N2O2
| 吡嗪;中间体;杂环砌块;通用试剂;化工原料;医药中间体;化工中间体;小分子抑制剂;合成材料中间体;氨基酸及其衍生物 | 中间体 |
| 5 | 50681-25-9 | 4-哒嗪羧酸 | 4-Pyridazinecarboxylic acid | C5H4N2O2
| 哒嗪;合成;化工原料;医药中间体;吡嗪类系列 | |
| 6 | 31462-59-6 | 4-嘧啶甲酸 | pyrimidine-4-carboxylic acid | C5H4N2O2
| 嘧啶;合成;嘧啶类;对照品;化学试剂;嘧啶类系列;医药中间体;中间体-有机中间体 | |
| 7 | | 4-PyridazinecarboxylicAcid97% | 4-PyridazinecarboxylicAcid97% | C5H4N2O2
| | |
| 8 | 148832-75-1 | 3,5-吡唑二甲醛 | 3,5-(1H)-pyrazoledicarbaldehyde | C5H4N2O2
| | |
| 9 | 208984-16-1 | 2(1H)-Pyridinone,3-nitroso-(9CI) | 2(1H)-Pyridinone,3-nitroso-(9CI) | C5H4N2O2
| | |
| 10 | | 6-OXO-PYRIDAZINE-3-CARBOXALDEHYDE | 6-OXO-PYRIDAZINE-3-CARBOXALDEHYDE | C5H4N2O2
| | |
| 11 | | 6-Hydroxypyridazine-3-carboxaldehyde | 6-Hydroxypyridazine-3-carboxaldehyde | C5H4N2O2
| | |
| 12 | 15009-91-3 | 2-硝基吡啶 | Pyridine, 2-nitro- (6CI, 7CI, 8CI, 9CI) | C5H4N2O2
| | |
| 13 | 50866-32-5 | 5-OXO-4,5-DIHYDROPYRAZINE-2-CARBALDEHYDE | 5-OXO-4,5-DIHYDROPYRAZINE-2-CARBALDEHYDE | C5H4N2O2
| | |
| 14 | 135205-66-2 | 2,5-二氧代-1-吡咯烷甲腈 | 1-Pyrrolidinecarbonitrile,2,5-dioxo-(9CI) | C5H4N2O2
| | |
| 15 | 950514-12-2 | 2-氧代-1,2-二氢嘧啶-4-甲醛 | 2-Oxo-1,2-dihydropyriMidine-4-carbaldehyde | C5H4N2O2
| | |
| 16 | 933734-91-9 | 3-甲酰-6-羟基哒嗪 | 1,6-DIHYDRO-6-OXO-3-PYRIDAZINECARBOXALDEHYDE | C5H4N2O2
| | |
| 17 | 2040-70-2 | 醋酸二氰基甲酯 | Acetic Acid, Dicyano-, Methyl Ester(WX683037) | C5H4N2O2
| | |
| 18 | 13673-29-5 | 4-亚硝基吡啶 N-氧化物 | Pyridine, 4-nitroso-, 1-oxide (6CI,7CI,8CI,9CI) | C5H4N2O2
| | |
| 19 | 166757-62-6 | 2-氧代-1,2-二氢嘧啶-5-甲醛 | 5-Pyrimidinecarboxaldehyde, 1,2-dihydro-2-oxo- (9CI) | C5H4N2O2
| 其它;有机化学 | |
| 20 | 83544-53-0 | 4-羟基-2-氧代-2,5-二氢-1H-吡咯-3-甲腈 | 1H-Pyrrole-3-carbonitrile, 2,5-dihydro-4-hydroxy-2-oxo- | C5H4N2O2
| | |