3-Bromo-2-(difluoromethyl)-4-(trifluoromethyl)pyridine-6-carboxylic acid
6-Bromo-2-(difluoromethyl)-3-(trifluoromethyl)pyridine-4-carboxylic acid
2-Chloro-4-cyano-6-(difluoromethyl)-3-methylpyridine
2-Chloro-4-cyano-5-(difluoromethyl)-3-methylpyridine