Ethyl 2,3-dimethyl-6-(trifluoromethoxy)pyridine-5-carboxylate
Methyl 2,6-dimethyl-4-(trifluoromethoxy)pyridine-3-carboxylate
Methyl 2,5-dimethyl-4-(trifluoromethoxy)pyridine-3-carboxylate
Methyl 2,4-dimethyl-5-(trifluoromethoxy)pyridine-3-carboxylate