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