Liu D, Zhou S, Gao J, Xu D. Phosphomolybdic Acid Catalyzed Synthesis of 13-Aryl-5H-dibenzo[b,i]-xanthene-5,7,12,14(13H)-tetraones. ajc [Internet]. 2013 Aug. 12 [cited 2024 Jul. 22];25(14):7864-6. Available from: https://asianpubs.org/index.php/ajchem/article/view/25_15_48