3-Cyano-2-hydroxy-5-nitro-6-(trifluoromethoxy)pyridine
3-Chloro-5-(difluoromethyl)-4-methyl-2-(trifluoromethoxy)pyridine
3-(Chloromethyl)-4-cyano-2-hydroxy-5-(trifluoromethoxy)pyridine
3-Chloro-4-(difluoromethyl)-5-methyl-2-(trifluoromethoxy)pyridine