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