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