Ethyl 4-chloro-2-methyl-3-(trifluoromethoxy)pyridine-5-carboxylate
Ethyl 4-chloro-5-methyl-2-(trifluoromethoxy)pyridine-3-carboxylate
Ethyl 3-chloro-2-methyl-4-(trifluoromethoxy)pyridine-5-carboxylate
Ethyl 3-chloro-5-methyl-4-(trifluoromethoxy)pyridine-2-carboxylate