4-Amino-3-cyano-2-(difluoromethyl)-5-iodopyridine
3-Cyano-4-(difluoromethyl)-2-iodo-6-(trifluoromethoxy)pyridine
2-(Difluoromethyl)-5-methoxy-6-nitropyridine-3-sulfonyl chloride
3-(Chloromethyl)-2-(difluoromethyl)-4-hydroxy-5-(trifluoromethoxy)pyridine