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