Ethyl 4-methoxy-5-nitro-2-(trifluoromethoxy)pyridine-3-carboxylate
Ethyl 5-(difluoromethyl)-2-iodo-4-(trifluoromethoxy)pyridine-3-acetate
Ethyl 4-methoxy-3-nitro-5-(trifluoromethoxy)pyridine-2-carboxylate
Ethyl 4-(difluoromethyl)-5-iodo-2-(trifluoromethoxy)pyridine-3-acetate