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