Methyl 2-chloro-5-(difluoromethyl)-3-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 6-chloro-4-(difluoromethyl)-3-(trifluoromethoxy)pyridine-2-carboxylate
5-Chloro-2-(difluoromethyl)-3-(trifluoromethoxy)pyridine-4-carboxylic acid
4-Chloro-6-(difluoromethyl)-3-(trifluoromethoxy)pyridine-2-carboxylic acid