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