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