Methyl 3-(aminomethyl)-4-chloro-2-(difluoromethyl)pyridine-6-carboxylate
Methyl 2-cyano-5-(difluoromethyl)-4-hydroxypyridine-3-acetate
Methyl 2-cyano-4-(difluoromethyl)-5-hydroxypyridine-3-acetate
5-Cyano-3-(difluoromethyl)-2-hydroxypyridine-4-acetic acid