Ethyl 3-(chloromethyl)-4-cyano-2-(trifluoromethoxy)pyridine-5-acetate
5-(Bromomethyl)-4-chloro-3-(trifluoromethoxy)pyridine-2-acetic acid
5-Amino-4-(difluoromethyl)-3-methylpyridine-2-carbonyl chloride
2,5-Diamino-3-(difluoromethyl)pyridine-6-carboxamide