Methyl 2-amino-3-(bromomethyl)-4-(trifluoromethoxy)pyridine-5-acetate
Methyl 4-amino-6-nitro-2-(trifluoromethoxy)pyridine-3-acetate
Methyl 4-amino-6-nitro-3-(trifluoromethoxy)pyridine-2-acetate
Methyl 3-amino-6-nitro-2-(trifluoromethoxy)pyridine-5-acetate