4-Bromo-3-hydroxy-6-nitro-2-(trifluoromethoxy)pyridine
2-Bromo-6-(difluoromethyl)-4-methoxy-3-(trifluoromethoxy)pyridine
2-Bromo-5-(difluoromethyl)-4-methoxy-3-(trifluoromethoxy)pyridine
6-Bromo-4-(difluoromethyl)-2-methoxy-3-(trifluoromethoxy)pyridine