Methyl 5-cyano-4-(difluoromethyl)-2-hydroxypyridine-3-carboxylate
6-Cyano-2-(difluoromethyl)-4-nitro-3-(trifluoromethoxy)pyridine
3-Hydroxy-6-methoxy-2-(trifluoromethoxy)-4-(trifluoromethyl)pyridine
2-Fluoro-4-(fluoromethyl)-3-(trifluoromethoxy)pyridine-6-carboxylic acid