Methyl 2-fluoro-6-nitro-3-(trifluoromethoxy)pyridine-4-carboxylate
5-(Difluoromethyl)-2-methoxy-4-nitropyridine-3-sulfonyl chloride
5-(Difluoromethyl)-3-hydroxy-4-iodopyridine-2-sulfonyl chloride
3-Cyano-5-(difluoromethyl)-4-fluoropyridine-2-methanol