3-(Difluoromethyl)pyridine-5-carboxylic acid
4-(Bromomethyl)-3-(difluoromethyl)-2-(trifluoromethoxy)pyridine-5-carbonyl chloride
4-(Bromomethyl)-6-(difluoromethyl)-3-(trifluoromethoxy)pyridine-2-carbonyl chloride
2-(Bromomethyl)-3-(difluoromethyl)-6-(trifluoromethoxy)pyridine-4-sulfonyl chloride