3-Cyano-2-(trifluoromethoxy)pyridine-6-carbonyl chloride
4-(Difluoromethyl)-5-methoxy-2-nitropyridine-3-carbonyl chloride
5-(Difluoromethyl)-4-methoxy-2-nitropyridine-3-carbonyl chloride
2-(Difluoromethyl)-6-methoxy-4-nitropyridine-3-carbonyl chloride