Suthinee Boonananwong, Boonsong Kongkathip, and Ngampong Kongkathip. “Synthesis and Biological Evaluation of 3,16,20-Polyoxygenated Steroids of Marine Origin and Their Analogs”. Agriculture and Natural Resources, vol. 42, no. 3, Sept. 2008, pp. 531-42, https://li01.tci-thaijo.org/index.php/anres/article/view/244481.