Ethyl 2-cyano-3-(difluoromethyl)-5-(trifluoromethyl)pyridine-4-acetate
Methyl 2-cyano-6-(difluoromethyl)-4-(trifluoromethyl)pyridine-3-acetate
Ethyl 3-(bromomethyl)-4-cyano-2-(difluoromethyl)pyridine-6-acetate
6-(Difluoromethyl)-4-fluoro-3-hydroxypyridine-2-acetic acid