Journal
ORGANIC LETTERS
Volume 11, Issue 5, Pages 1131-1133Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol8029577
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Funding
- Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT)
- NCET Foundation
- NSFC [30725045]
- National 863 Program [2006AA02Z338]
- China Postdoctoral Science Foundation [20070410711]
- 973program of China [2007CB507400]
- Shanghai Leading Academic Discipline Project [B906]
- Scientific Foundation of Shanghai China [07DZ19728, 06DZ19717, 06DZ19005]
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A novel cycloheptapeptide, tunicyclin A, with a unique tricyclic ring cyclopeptide skeleton, was isolated from Psammosilene tunicoides. Its structure was elucidated by extensive NMR and MS analysis. Biogenetically, tunicyclin A might be derived from cyclo-(Pro(1)-Ser(2)-(gamma-keto-delta-aldehedyl-Glu(3))-Leu(4)-Val(5)-Gly(6)-Ser(7)) via two steps of nucleophilic addition.
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