Methyl 3-chloro-4-(difluoromethyl)-2-hydroxypyridine-6-carboxylate
Methyl 3-chloro-2-(difluoromethyl)-6-hydroxypyridine-4-carboxylate
Ethyl 2-chloro-4-(difluoromethyl)-3-hydroxypyridine-6-acetate
Ethyl 2-chloro-3-(difluoromethyl)-6-hydroxypyridine-4-acetate