Fig. 1From: Regioselective semi-synthesis of 6-isomers of 5,8-O-dimethyl ether of shikonin derivatives via an ‘intramolecular ring-closing/ring-opening’ strategy as potent anticancer agentsStructures of C-6 or C-2 substituted 5,8-dimethoxyl-1,4-naphthaquinone derivativesBack to article page