Ethyl 5-(difluoromethyl)-2-methoxy-4-nitropyridine-3-carboxylate
Ethyl 5-(difluoromethyl)-2-methoxy-3-nitropyridine-4-carboxylate
2-(Difluoromethyl)-3-methyl-5-nitropyridine-4-acetonitrile
Ethyl 4-(difluoromethyl)-3-methoxy-6-nitropyridine-2-carboxylate