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
6-(Difluoromethyl)-4-methoxy-2-nitro-3-(trifluoromethoxy)pyridine