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