Ethyl 6-(difluoromethyl)-2-methyl-3-nitropyridine-4-carboxylate
Methyl 4-(difluoromethyl)-5-methyl-3-nitropyridine-2-acetate
Methyl 2-(difluoromethyl)-4-methyl-6-nitropyridine-3-carboxylate
Methyl 2-(difluoromethyl)-4-methyl-5-nitropyridine-3-carboxylate