2-(Chloromethyl)-4-(difluoromethyl)-3-(trifluoromethoxy)pyridine-6-carboxylic acid
2-(Chloromethyl)-3-(difluoromethyl)-6-(trifluoromethoxy)pyridine-4-carboxylic acid
4-Cyano-3-(difluoromethyl)-5-methoxypyridine
2-(Chloromethyl)-3-(difluoromethyl)-4-(trifluoromethoxy)pyridine-6-carboxylic acid