Ethyl 2-cyano-3-(trifluoromethoxy)pyridine-6-carboxylate
Methyl 3-cyano-2-(trifluoromethoxy)pyridine-5-carboxylate
Ethyl 2-cyano-3-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 5-cyano-2-(trifluoromethoxy)pyridine-4-carboxylate
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