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