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