Ethyl 2-(difluoromethyl)-4-nitro-3-(trifluoromethoxy)pyridine-5-carboxylate
6-Methyl-2-nitro-4-(trifluoromethoxy)pyridine-3-carbonyl chloride
Ethyl 2-(difluoromethyl)-3-nitro-5-(trifluoromethoxy)pyridine-6-carboxylate
Methyl 3-(difluoromethyl)-6-nitro-4-(trifluoromethoxy)pyridine-2-carboxylate