Methyl 4-chloro-6-nitro-3-(trifluoromethoxy)pyridine-2-carboxylate
4-(Chloromethyl)-3-cyano-2-nitro-5-(trifluoromethoxy)pyridine
5-(Chloromethyl)-3-cyano-4-nitro-2-(trifluoromethoxy)pyridine
5-(Chloromethyl)-4-cyano-3-nitro-2-(trifluoromethoxy)pyridine