Methyl 3-(difluoromethyl)-2-hydroxy-6-(trifluoromethyl)pyridine-5-carboxylate
2-(Difluoromethyl)-3-hydroxy-5-(trifluoromethyl)pyridine-4-acetic acid
3-(Bromomethyl)-4-(difluoromethyl)-2-iodo-6-nitropyridine
4-(Chloromethyl)-3-(difluoromethyl)-2-iodo-5-nitropyridine