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