Ethyl 2-methoxy-3-nitro-6-(trifluoromethoxy)pyridine-4-carboxylate
4-(Fluoromethyl)-5-methoxy-2-(trifluoromethoxy)pyridine-3-acetic acid
Ethyl 2-methoxy-3-nitro-4-(trifluoromethoxy)pyridine-6-carboxylate
4-(Fluoromethyl)-3-methoxy-5-(trifluoromethoxy)pyridine-2-acetic acid