Methyl 2-(difluoromethyl)-6-methyl-5-(trifluoromethoxy)pyridine-3-acetate
Methyl 2-(difluoromethyl)-6-methyl-4-(trifluoromethoxy)pyridine-3-acetate
Methyl 3-(fluoromethyl)-4-methyl-2-(trifluoromethoxy)pyridine-5-acetate
Methyl 3-(fluoromethyl)-2-methyl-5-(trifluoromethoxy)pyridine-4-acetate