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