2-Amino-3-(difluoromethyl)-6-hydroxy-5-(trifluoromethyl)pyridine
2-Amino-3-(difluoromethyl)-6-hydroxy-4-(trifluoromethyl)pyridine
4-Amino-5-(chloromethyl)-2-(difluoromethyl)-3-hydroxypyridine
4-Amino-3-(chloromethyl)-6-(difluoromethyl)-2-hydroxypyridine