Ethyl 2-amino-5-(difluoromethyl)-6-(trifluoromethyl)pyridine-3-carboxylate
Ethyl 2-amino-5-(difluoromethyl)-4-(trifluoromethyl)pyridine-3-carboxylate
Ethyl 6-amino-2-(chloromethyl)-4-(difluoromethyl)pyridine-3-acetate
Ethyl 6-amino-4-(difluoromethyl)-2-(trifluoromethyl)pyridine-3-carboxylate