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