Ethyl 3-hydroxy-2-nitro-5-(trifluoromethoxy)pyridine-6-carboxylate
Ethyl 3-hydroxy-2-nitro-4-(trifluoromethoxy)pyridine-5-carboxylate
4-Hydroxy-3-methoxy-6-(trifluoromethoxy)pyridine-2-carbonyl chloride
Methyl 2-hydroxy-4-nitro-3-(trifluoromethoxy)pyridine-5-carboxylate