Ethyl 3-chloro-2-hydroxy-6-(trifluoromethoxy)pyridine-5-carboxylate
Ethyl 3-chloro-2-hydroxy-5-(trifluoromethoxy)pyridine-4-carboxylate
4-Cyano-5-methyl-3-(trifluoromethoxy)pyridine-2-carboxylic acid
Ethyl 6-chloro-2-hydroxy-3-(trifluoromethoxy)pyridine-4-carboxylate