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