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