6-(Chloromethyl)-4-(difluoromethyl)-2-methylpyridine-3-carboxylic acid
2-(Chloromethyl)-4-(difluoromethyl)-6-methylpyridine-3-carboxylic acid
6-(Chloromethyl)-4-(difluoromethyl)-3-methylpyridine-2-carboxylic acid
2-(Chloromethyl)-4-(difluoromethyl)-5-methylpyridine-3-carboxylic acid