Ethyl 3-(difluoromethyl)-4-methyl-2-nitropyridine-5-carboxylate
2-(Difluoromethyl)-5-methyl-3-nitropyridine-6-carbonyl chloride
Ethyl 3-(difluoromethyl)-2-methyl-6-nitropyridine-4-carboxylate
Ethyl 3-(difluoromethyl)-2-methyl-5-nitropyridine-4-carboxylate