Methyl 5-iodo-2-nitro-3-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 4-iodo-5-nitro-3-(trifluoromethoxy)pyridine-2-carboxylate
Methyl 4-iodo-3-nitro-2-(trifluoromethoxy)pyridine-5-carboxylate
Methyl 4-iodo-6-nitro-3-(trifluoromethoxy)pyridine-2-carboxylate