6-Cyano-2-(difluoromethyl)-3-methoxy-4-(trifluoromethoxy)pyridine
4-Chloro-5-(difluoromethyl)-3-methyl-2-(trifluoromethoxy)pyridine
2-Cyano-6-(difluoromethyl)-4-methoxy-3-(trifluoromethoxy)pyridine
4-Chloro-6-(difluoromethyl)-3-methyl-2-(trifluoromethoxy)pyridine