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