2-Bromo-4-chloro-3-(trifluoromethoxy)pyridine-6-sulfonyl chloride
5-Amino-3-(difluoromethyl)-2-(trifluoromethoxy)pyridine-4-acetonitrile
3-Amino-5-(difluoromethyl)-4-(trifluoromethoxy)pyridine-2-acetonitrile
5-Amino-4-(difluoromethyl)-2-(trifluoromethoxy)pyridine-3-acetonitrile