Ethyl 6-(difluoromethyl)-4-nitro-3-(trifluoromethoxy)pyridine-2-carboxylate
Methyl 2-methyl-3-nitro-6-(trifluoromethoxy)pyridine-4-acetate
Methyl 5-(difluoromethyl)-2-nitro-3-(trifluoromethoxy)pyridine-4-carboxylate
6-(Difluoromethyl)-2-nitro-3-(trifluoromethoxy)pyridine-4-carboxylic acid