HONG, GAO, ZHANQIAN SONG, SHIBIN SHANG, XU XU, and XIANKAI WANG. “Synthesis, Crystal Structure and Application of Maleopimaric Acid Mono-Ethyl Ester”. Asian Journal of Chemistry 22, no. 6 (May 17, 2010): 4681–4687. Accessed July 7, 2024. https://asianpubs.org/index.php/ajchem/article/view/16823.