3-Chloro-5-(difluoromethyl)-2-nitropyridine-4-carboxylic acid
Ethyl 2-chloro-5-(difluoromethyl)-6-nitropyridine-3-carboxylate
4-Chloro-2-(difluoromethyl)-3-hydroxypyridine-6-carboxylic acid
3-Chloro-4-(difluoromethyl)-6-hydroxypyridine-2-carboxylic acid