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