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