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