6-Amino-3-(difluoromethyl)-4-hydroxy-2-(trifluoromethoxy)pyridine
6-Amino-4-(difluoromethyl)-3-hydroxy-2-(trifluoromethoxy)pyridine
5-Bromo-4-chloro-2-methyl-3-(trifluoromethoxy)pyridine
2-Amino-3-(difluoromethyl)-5-hydroxy-6-(trifluoromethoxy)pyridine