Methyl 3-chloro-6-(difluoromethyl)-2-(trifluoromethoxy)pyridine-5-carboxylate
Methyl 5-chloro-2-(difluoromethyl)-3-(trifluoromethoxy)pyridine-6-carboxylate
Methyl 3-chloro-5-methoxy-4-(trifluoromethoxy)pyridine-2-carboxylate
Methyl 5-chloro-4-methoxy-2-(trifluoromethoxy)pyridine-3-carboxylate