Fig. 3. Key 1H–1H in Pimarane, abietane, and labdane diterpenoids from Euphorbia pekinensis Rupr. and their anti-tumor activities

Fig. 3. Key 1H–1H COSY (red bold lines) and HMBC (blue→) of compound 9 (a), NOSEY correlation (blue→) of compound 9 (b), The ORTEP drawing of compound 9 (c). (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)Published as part of Chen, Yan-Yan, Zeng, Xiao-Tao, Xu, Ding-Qiao, Yue, Shi-Jun, Fu, Rui-Jia, Yang, Xue, Liu, Zhao-Xi & Tang, Yu-Ping, 2022, Pimarane, abietane, and labdane diterpenoids from Euphorbia pekinensis Rupr. and their anti-tumor activities, pp. 1-8 in Phytochemistry (113113) 197 on page 4, DOI: 10.1016/j.phytochem.2022.113113, http://zenodo.org/record/823523