Fig. 1 in Guaianolide sesquiterpene lactones from Achillea millefolium L

Fig. 1. Structures of compounds 1–12.Published as part of Li, Hongliang, Li, Jun, Liu, Mengqi, Xie, Rongrong, Zang, Yi, Li, Jia & Aisa, Haji Akber, 2021, Guaianolide sesquiterpene lactones from Achillea millefolium L, pp. 1-9 in Phytochemistry (112733) 186 on page 2, DOI: 10.1016/j.phytochem.2021.112733, http://zenodo.org/record/825852