3-Cyano-6-hydroxy-2-(trifluoromethoxy)pyridine-5-carboxylic acid
4-Fluoro-3-methyl-2-(trifluoromethoxy)pyridine-6-acetic acid
6-Cyano-3-hydroxy-4-(trifluoromethoxy)pyridine-2-acetic acid
6-Cyano-4-hydroxy-3-(trifluoromethoxy)pyridine-2-acetic acid
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