| NO. | Name | CAS No. |
| 21 | 2-Amino-3-(trifluoromethyl)pyridine | 183610-70-0 |
| 22 | 2-Chloro-4-(trifluoromethyl)pyridine | 81565-18-6 |
| 23 | 2-Amino-4-(trifluoromethyl)pyridine | 106447-97-6 |
| 24 | 2-fluoropyridine | 372-48-5 |
| 25 | 2,3-Difluoropyridine | 1513-66-2 |
| 26 | 2,6-Difluoropyridine | 1513-65-1 |
| 27 | 2-Chloro-3-fluoro-4-methylpyridine | 881891-82-3 |
| 28 | 2-Cyano-4-(trifluoromethyl)pyridine | 936841-69-9 |
| 29 | 2-Cyano-4-(trifluoromethyl)pyridine | 936841-69-9 |
| 30 | 2-Chloro-3-fluoro-4-methylpyridine | 881891-82-3 |
| 31 | 2,6-Difluoropyridine | 1513-65-1 |
| 32 | 2,3-Difluoropyridine | 1513-66-2 |
| 33 | 2-fluoropyridine | 372-48-5 |
| 34 | 2-Amino-4-(trifluoromethyl)pyridine | 106447-97-6 |
| 35 | 2-Chloro-4-(trifluoromethyl)pyridine | 81565-18-6 |
| 36 | 2-Amino-3-(trifluoromethyl)pyridine | 183610-70-0 |
| 37 | 2-hydroxy-3-trifluoromethylpyridine | 22245-83-6 |
| 38 | 2-chloro-3-(trifluoromethyl)pyridine | 65753-47-1 |
| 39 | 2-hydroxy-6-(trifluoromethyl) pyridine | 34486-06-1 |
| 40 | 2-Chloro-6-(trifluoromethyl)pyridine | 39890-95-4 |
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