Two New Cycloheptapeptides from Psammosilene tunicoides |
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| Authors: | Jun‐Mian Tian Jin‐Ming Gao Lu Lu Yi‐Ren He Yun‐Heng Shen Hui‐Liang Li Juan Su Run‐Hui Liu Lei Shan Wei‐Dong Zhang |
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| Institution: | 1. Department of Phytochemistry, School of Pharmacy, Second Military Medical University, Shanghai 200433, P.?R. China (phone/fax: +86‐21‐81871244 (W.‐D. Z.), +86‐21‐81871245 (Y.‐H. S.));2. College of Science, Northwest A & F University, Yangling 712100, P.?R. China;3. King Saud University, Riyadh 11451, Saudi Arabia |
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| Abstract: | Two new cycloheptapeptides, tunicyclins F and G, were isolated from the roots of Psammosilene tunicoides. Their chemical structures were elucidated by extensive analysis of 1D‐ and 2D‐NMR, as well as HR‐ESI‐MS data. Tunicyclin G contains an unusual α,β‐dehydrotryptophan (ΔZ‐Trp) residue, which mainly occurs in the cyclic peptides from marine sponge and bacteria. |
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| Keywords: | Cyclic peptides Peptides Tunicyclins F and G Psammosilene tunicoides |
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