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