%A DING Zhong - Tao, WANG You -Chu, ZHOU Jun ,TAN Ning -Hua, WU Hou - Ming %T Cyclic Peptides from the Roots of Psammosilene tunicoides * %0 Journal Article %D 2000 %J Plant Diversity %R %P 1-3 %V 22 %N 03 %U {https://journal.kib.ac.cn/CN/abstract/article_32570.shtml} %8 2000-06-25 %X From PsammosUene tunicoides W. C. Wu et C. Y. Wu, two new natural cyclic dipeptides and two new cyclic octapeptides (named psammosilenins A and B) were isolated. Their structures were deter-mined as cycio (-Ala-Ala-), cycio (-Val-Ala-), cycio ( - Pro1, - Phe1 - Pro2 - Phe2 - Phe3 -Ala- Pro3 -Leu-) and cycle ( - Prol - Gly - Phe1- Val - Pro2 - Phe2 - Thr - Ile - ) by spectroscopic methods respectively.