Ethyl 2-nitro-3-(trifluoromethoxy)pyridine-4-carboxylate
Ethyl 2-(chloromethyl)-5-(difluoromethyl)-6-methoxypyridine-3-carboxylate
Methyl 5-nitro-2-(trifluoromethoxy)pyridine-3-carboxylate
Ethyl 2-(chloromethyl)-5-(difluoromethyl)-4-methoxypyridine-3-carboxylate