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