3,6-Dimethoxy-4-(trifluoromethoxy)pyridine-2-carbonyl chloride
2,6-Dimethoxy-4-(trifluoromethoxy)pyridine-3-carbonyl chloride
2,5-Dimethoxy-3-(trifluoromethoxy)pyridine-6-carbonyl chloride
2,6-Dimethoxy-3-(trifluoromethoxy)pyridine-4-carbonyl chloride