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