Methyl 5-chloro-2-(difluoromethyl)-3-nitropyridine-6-carboxylate
Methyl 4-chloro-2-(difluoromethyl)-6-nitropyridine-3-carboxylate
Methyl 3-chloro-5-(difluoromethyl)-2-nitropyridine-6-carboxylate
2-Cyano-6-(difluoromethyl)-3-hydroxypyridine-5-carboxaldehyde