Methyl 2-bromo-3-(difluoromethyl)-6-(trifluoromethoxy)pyridine-5-acetate
Methyl 2-bromo-4-(difluoromethyl)-3-(trifluoromethoxy)pyridine-5-acetate
Methyl 2-bromo-3-(difluoromethyl)-5-(trifluoromethoxy)pyridine-4-acetate
Methyl 2-bromo-3-(difluoromethyl)-4-(trifluoromethoxy)pyridine-5-acetate