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