4-Amino-2-(difluoromethyl)-3-hydroxy-5-(trifluoromethoxy)pyridine
3-Amino-5-(difluoromethyl)-2-hydroxy-4-(trifluoromethoxy)pyridine
3-Amino-6-hydroxy-4-(trifluoromethoxy)pyridine-2-acetonitrile
4-Amino-5-hydroxy-3-(trifluoromethoxy)pyridine-2-acetonitrile