3-Amino-6-(difluoromethyl)-2-(trifluoromethyl)pyridine-4-acetic acid
3-Bromo-2-(bromomethyl)-4-chloro-6-(difluoromethyl)pyridine
5-Amino-2-(difluoromethyl)-4-(trifluoromethyl)pyridine-3-acetic acid
5-Bromo-3-(bromomethyl)-2-chloro-4-(difluoromethyl)pyridine