Ethyl 2-chloro-3-(difluoromethyl)-4-methylpyridine-5-carboxylate
5-(Difluoromethyl)-3-methoxy-2-nitropyridine-4-sulfonyl chloride
3-(Difluoromethyl)-2-methoxy-5-nitropyridine-4-sulfonyl chloride
Ethyl 2,6-dibromo-3-(trifluoromethoxy)pyridine-5-carboxylate