Ethyl 2-(difluoromethyl)-4-methyl-3-nitropyridine-5-acetate
3-(Difluoromethyl)-4-methoxy-2-(trifluoromethyl)pyridine-6-acetonitrile
Ethyl 2-(difluoromethyl)-3-methyl-6-nitropyridine-4-acetate
Ethyl 2-(difluoromethyl)-3-methyl-5-nitropyridine-4-acetate