2-(Difluoromethyl)-6-nitro-3-(trifluoromethoxy)pyridine-4-sulfonamide
5-(Bromomethyl)-4-(difluoromethyl)-3-(trifluoromethoxy)pyridine-2-acetic acid
6-(Difluoromethyl)-3-nitro-4-(trifluoromethoxy)pyridine-2-sulfonamide
3-(Bromomethyl)-4-(difluoromethyl)-2-(trifluoromethoxy)pyridine-5-acetic acid