| 1 | | 2,6-DICHLOROPYRIDAZINE | 2,6-DICHLOROPYRIDAZINE | C4H4Cl2N2
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| 2 | 71501-49-0 | 2-chloropyrimidinium chloride | 2-chloropyrimidinium chloride | C4H4Cl2N2
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| 3 | 15965-33-0 | 4,5-二氯-2-甲基咪唑 | 4,5-Dichloro-2-Methylimidazole | C4H4Cl2N2
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| 4 | 77722-80-6 | 4-氯嘧啶盐酸盐 | 2-Chloropyrimidinehydrochloride | C4H4Cl2N2
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| 5 | 179051-78-6 | 4-氯嘧啶盐酸盐 | 4-chloropyrimidine hydrochloride | C4H4Cl2N2
| 嘧啶 | |
| 6 | 1193386-63-8 | 4-氯哒嗪盐酸盐 | 4-Chloro-pyridazine hydrochloride | C4H4Cl2N2
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| 7 | 101258-47-3 | 1H-Pyrazole, 3,4-dichloro-5-methyl- | 1H-Pyrazole, 3,4-dichloro-5-methyl- | C4H4Cl2N2
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| 8 | 756430-74-7 | 1H-Pyrazole,3-(dichloromethyl)-(9CI) | 1H-Pyrazole,3-(dichloromethyl)-(9CI) | C4H4Cl2N2
| | |
| 9 | 80199-87-7 | 1H-Pyrazole, 4-chloro-1-(chloromethyl)- | 1H-Pyrazole, 4-chloro-1-(chloromethyl)- | C4H4Cl2N2
| | |
| 10 | 203521-18-0 | 4-氯嘧啶盐酸盐 | PyriMidine, 4-chloro-, hydrochloride (1:2) | C4H4Cl2N2
| | |
| 11 | 401564-64-5 | Pyridazine, 1,3-dichloro-1,2-dihydro- (9CI) | Pyridazine, 1,3-dichloro-1,2-dihydro- (9CI) | C4H4Cl2N2
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