Methyl 3-chloro-6-nitro-2-(trifluoromethoxy)pyridine-5-carboxylate
4-Chloro-2-(chloromethyl)-6-nitro-3-(trifluoromethoxy)pyridine
Methyl 5-chloro-2-nitro-3-(trifluoromethoxy)pyridine-6-carboxylate
4-Chloro-2-(chloromethyl)-3-nitro-6-(trifluoromethoxy)pyridine