Ahmad V U, Noorwala M, Mohammad F V, Sener B
H.E.J. Research Institute of Chemistry, University of Karachi, Pakistan.
J Nat Prod. 1993 Mar;56(3):329-34. doi: 10.1021/np50093a003.
Chemical investigation of the EtOH-soluble portion of Symphytum officinale roots has resulted in the isolation of a new pentacyclic triterpene glycoside of oleanolic acid. Its structure was elucidated by spectroscopic studies, including 2D nmr, and chemical evidences as 3-O-[beta-D-glucopyranosyl-(1-->4)-beta-D-glucopyranosyl-(1-->4)-alpha-L -arabinopyranosyl]-oleanolic acid [1].
对药用琉璃苣根的乙醇可溶部分进行化学研究，分离出一种新的齐墩果酸五环三萜糖苷。通过光谱研究（包括二维核磁共振）和化学证据确定其结构为3 - O - [β - D - 吡喃葡萄糖基 - (1→4) - β - D - 吡喃葡萄糖基 - (1→4) - α - L - 阿拉伯吡喃糖基] - 齐墩果酸 [1]。
