Ethyl 2-(bromomethyl)-4-(trifluoromethoxy)-5-(trifluoromethyl)pyridine-3-carboxylate
Ethyl 2-(difluoromethyl)-4-nitro-3-(trifluoromethoxy)pyridine-5-acetate
Ethyl 2-(difluoromethyl)-3-nitro-5-(trifluoromethoxy)pyridine-6-acetate
Ethyl 2-(difluoromethyl)-3-nitro-4-(trifluoromethoxy)pyridine-5-acetate