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