Methyl 3-(difluoromethyl)-4-methoxy-6-nitropyridine-2-carboxylate
4-(Difluoromethyl)-3-methoxy-2-nitropyridine-6-carboxylic acid
4-(Difluoromethyl)-6-methoxy-2-methylpyridine-3-carbonyl chloride
4-(Difluoromethyl)-2-methoxy-6-nitropyridine-3-carboxylic acid