Ethyl 4-(difluoromethyl)-5-nitro-3-(trifluoromethoxy)pyridine-2-acetate
3-(Chloromethyl)-2-methyl-6-nitro-5-(trifluoromethoxy)pyridine
3-(Chloromethyl)-2-methyl-5-nitro-4-(trifluoromethoxy)pyridine
Ethyl 4-(difluoromethyl)-3-nitro-2-(trifluoromethoxy)pyridine-5-acetate