Ethyl 3-(difluoromethyl)-4-methyl-5-(trifluoromethoxy)pyridine-2-carboxylate
Ethyl 3-(difluoromethyl)-2-methyl-6-(trifluoromethoxy)pyridine-5-carboxylate
Ethyl 6-(difluoromethyl)-2-methyl-3-(trifluoromethoxy)pyridine-4-carboxylate
Ethyl 2-(difluoromethyl)-6-methyl-4-(trifluoromethoxy)pyridine-3-carboxylate