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