3-(Difluoromethyl)-5-methoxy-4-nitro-2-(trifluoromethoxy)pyridine
3-(Difluoromethyl)-2-methoxy-6-nitro-5-(trifluoromethoxy)pyridine
2-(Difluoromethyl)-5-methoxy-4-nitro-3-(trifluoromethoxy)pyridine
4-(Aminomethyl)-6-methoxy-2-(trifluoromethoxy)pyridine-3-carboxylic acid