Fig. 4 in Progress in structure, synthesis and biological activity of natural cephalotane diterpenoids

Fig. 4. Structures of 17-nor-cephalotane-type diterpenoids (C19).Published as part of Jiang, Chunyu, Xue, Jingjing, Yuan, Yizhen, Li, Yanzhi, Zhao, Chunxue, Jing, Qinxue, Zhang, Xin, Yang, Mengyue, Han, Tong, Bai, Jiao, Li, Zhanlin, Li, Dahong & Hua, Huiming, 2021, Progress in structure, synthesis and biological activity of natural cephalotane diterpenoids, pp. 1-13 in Phytochemistry (112939) 192 on page 3, DOI: 10.1016/j.phytochem.2021.112939, http://zenodo.org/record/825744