Composition #1: Liu, Jie., Xu, Jing., Zhao, Xiao Jun., Gao, Wen Yuan., Zhang, Shu Zhong., Guo, Yuan Qiang. A new heterocyclic compound from Cyathula officinalis Kuan. chinese chemical letters, 2010, vol. 21, no. 1, p. 70–72. DOI: 10.1016/j.cclet.2009.08.006.
[
DOI link]