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