4-(Difluoromethyl)-3-methoxy-2-nitro-5-(trifluoromethoxy)pyridine
4-(Fluoromethyl)-2-methoxy-3-nitro-5-(trifluoromethoxy)pyridine
4-(Difluoromethyl)-6-methoxy-3-nitro-2-(trifluoromethoxy)pyridine
4-(Aminomethyl)-3-methoxy-6-(trifluoromethoxy)-2-(trifluoromethyl)pyridine