Ethyl 2-methoxy-3-nitro-5-(trifluoromethoxy)pyridine-4-acetate
Ethyl 2-methoxy-4-nitro-6-(trifluoromethoxy)pyridine-3-carboxylate
3-(Fluoromethyl)-6-methoxy-2-(trifluoromethoxy)pyridine-4-acetic acid
Methyl 5-methoxy-2-nitro-4-(trifluoromethoxy)pyridine-3-acetate