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