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