Lakshmi Narasimha Murthy, Yellajyosula, et al. “Synthesis and Antibacterial Assay of 9-Substituted Aryl-1,8-Dioxo-Octahydroxanthenes”.
Asian Journal of Chemistry
, vol. 26, no. 15, July 2014, pp. 4594-8, doi:10.14233/ajchem.2014.16128.