Ethyl 2-bromo-4-(difluoromethyl)-3-(trifluoromethyl)pyridine-5-carboxylate
Ethyl 2-bromo-3-(difluoromethyl)-6-(trifluoromethyl)pyridine-4-carboxylate
Ethyl 2-bromo-3-(difluoromethyl)-5-(trifluoromethyl)pyridine-4-carboxylate
Ethyl 2-bromo-3-(difluoromethyl)-4-(trifluoromethyl)pyridine-5-carboxylate