3-(Difluoromethyl)-2-nitro-5-(trifluoromethoxy)pyridine-6-acetonitrile
2-(Difluoromethyl)-3-methoxy-6-(trifluoromethoxy)pyridine-4-acetonitrile
3-(Difluoromethyl)-2-nitro-4-(trifluoromethoxy)pyridine-5-acetonitrile
3-Methoxy-5-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-4-carboxylic acid