3-Chloro-2-nitro-4-(trifluoromethoxy)pyridine-6-sulfonyl chloride
3-Cyano-2-(difluoromethyl)-6-hydroxy-4-(trifluoromethoxy)pyridine
2-Chloro-6-nitro-5-(trifluoromethoxy)pyridine-3-sulfonyl chloride
2-(Aminomethyl)-3-chloro-4-(trifluoromethoxy)pyridine-6-acetic acid