| 1 | 1187-11-7 | 2-乙酰丙二腈 | Acetylmalononitrile | C5H4N2O
| | |
| 2 | 79917-37-6 | Pyridine, 2-nitroso- | Pyridine, 2-nitroso- | C5H4N2O
| | |
| 3 | 809533-78-6 | 2-(唑-2-基)乙腈 | 2-Oxazoleacetonitrile | C5H4N2O
| | |
| 4 | 55242-83-6 | 3-氰甲基异噁唑 | 3-cyanomethylisoxazole | C5H4N2O
| | |
| 5 | 5780-66-5 | 2-吡嗪甲醛 | Pyrazine-2-carbaldehyde | C5H4N2O
| 医药原料;医药中间体 | |
| 6 | 60170-83-4 | 哒嗪-3-甲醛 | 3-Pyridazinecarbaldehyde | C5H4N2O
| 氮杂环 | |
| 7 | 2435-50-9 | 4-嘧啶甲醛 | pyrimidine-4-carbaldehyde | C5H4N2O
| 医药中间体 | |
| 8 | 10070-92-5 | 嘧啶-5-甲醛 | PYRIMIDINE-5-CARBOXALDEHYDE | C5H4N2O
| 醛;嘧啶;嘧啶类;嘧啶系列;通用试剂;有机砌块;医药中间体;合成材料中间体 | |
| 9 | | 2-R-PYRIMIDINE-4-CARBALDEHYDE | 2-R-PYRIMIDINE-4-CARBALDEHYDE | C5H4N2O
| | |
| 10 | 89282-09-7 | 2-甲基恶唑-4-甲腈 | 2-Methyloxazole-4-carbonitrile | C5H4N2O
| | |
| 11 | 672-81-1 | 甲氧基亚甲基丙二腈 | (Methoxymethylene)malononitrile | C5H4N2O
| | |
| 12 | 57351-99-2 | 5-甲基异噁唑-3-甲腈 | 5-methylisoxazole-3-carbonitrile | C5H4N2O
| 恶唑;其它;增稠剂;医药中间体 | |
| 13 | 139370-56-2 | 2-氨基呋喃-3-甲腈 | 3-Furancarbonitrile,2-amino-(9CI) | C5H4N2O
| | |
| 14 | 1003-52-7 | 4-甲基噁唑-5-腈 | 4-METHYL-1,3-OXAZOLE-5-CARBONITRILE | C5H4N2O
| | |
| 15 | 5515-35-5 | 2-(1-羟乙基)丙二腈 | Propanedinitrile, 2-(1-hydroxyethylidene)- | C5H4N2O
| | |