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