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