Methyl 4-(difluoromethyl)-2-(trifluoromethyl)pyridine-5-carboxylate
Methyl 3-(difluoromethyl)-5-(trifluoromethyl)pyridine-4-carboxylate
2,5-Dichloro-3-(difluoromethyl)-4-iodopyridine
Methyl 3-(difluoromethyl)-2-(trifluoromethyl)pyridine-5-carboxylate