3-Bromo-4-nitro-2-(trifluoromethoxy)pyridine-6-carboxaldehyde
5-(Difluoromethyl)-4-methoxy-3-nitropyridine-2-sulfonyl chloride
3-Cyano-5-(difluoromethyl)-2-hydroxypyridine-6-methanol
4-Fluoro-3-hydroxy-5-(trifluoromethoxy)pyridine-2-carbonyl chloride