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