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