4-Bromo-3-chloro-5-(trifluoromethoxy)pyridine-2-sulfonyl chloride
5-(Chloromethyl)-3-(difluoromethyl)-4-(trifluoromethyl)pyridine-2-sulfonyl chloride
4-(Difluoromethyl)-5-nitropyridine-2-sulfonamide
N'-((2-Hydroxynaphthalen-1-yl)methylene)isonicotinohydrazide