Ethyl 3-(difluoromethyl)-4-nitro-2-(trifluoromethoxy)pyridine-6-acetate
2-(Bromomethyl)-3-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-5-carboxaldehyde
Ethyl 3-(difluoromethyl)-2-nitro-6-(trifluoromethoxy)pyridine-4-acetate
Ethyl 3-(difluoromethyl)-4-nitro-2-(trifluoromethoxy)pyridine-5-acetate