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