3-Methoxy-2-nitro-5-(trifluoromethoxy)pyridine-6-sulfonyl chloride
4-(Chloromethyl)-3-methoxy-2-nitro-6-(trifluoromethoxy)pyridine
3-(Chloromethyl)-5-methoxy-2-nitro-6-(trifluoromethoxy)pyridine
3-(Chloromethyl)-2-methoxy-6-nitro-4-(trifluoromethoxy)pyridine