3-Cyano-2-hydroxy-4-(trifluoromethoxy)pyridine-6-sulfonyl chloride
2-Cyano-6-hydroxy-5-(trifluoromethoxy)pyridine-3-sulfonyl chloride
6-Chloro-4-(fluoromethyl)-3-(trifluoromethoxy)pyridine-2-carboxaldehyde
Ethyl 4-chloro-2-(chloromethyl)-6-(trifluoromethoxy)pyridine-3-carboxylate