5-(Bromomethyl)-2-cyano-3-(trifluoromethoxy)pyridine-4-acetonitrile
3-(Bromomethyl)-5-(difluoromethyl)-4-(trifluoromethoxy)pyridine-2-sulfonyl chloride
6-Cyano-3-(difluoromethyl)-4-hydroxypyridine-2-carbonyl chloride
4-Hydroxy-3-iodo-5-(trifluoromethoxy)pyridine-2-sulfonyl chloride