Ethyl 3-amino-2-(difluoromethyl)-6-(trifluoromethyl)pyridine-4-acetate
Ethyl 2-amino-5-(difluoromethyl)-3-(trifluoromethyl)pyridine-4-acetate
Ethyl 3-amino-2-(difluoromethyl)-4-(trifluoromethyl)pyridine-6-acetate
Methyl 4-bromo-2-chloro-5-(difluoromethyl)pyridine-3-carboxylate