Ethyl 5-(difluoromethyl)-4-methyl-2-(trifluoromethyl)pyridine-3-acetate
Ethyl 3-(difluoromethyl)-4-methyl-6-(trifluoromethyl)pyridine-2-acetate
Ethyl 5-(difluoromethyl)-4-methyl-3-(trifluoromethyl)pyridine-2-acetate
Ethyl 3-(difluoromethyl)-4-methyl-5-(trifluoromethyl)pyridine-2-acetate