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Speradines B-D, oxygenated cyclopiazonic acid alkaloids from the sponge-derived fungus Aspergillus flavus MXH-X104.
- Source :
-
Tetrahedron . May2015, Vol. 71 Issue 21, p3522-3527. 6p. - Publication Year :
- 2015
-
Abstract
- Two new highly oxygenated hexacyclic cyclopiazonic acid (CPA) alkaloids, speradines B and C ( 1 and 2 ), together with one new related tetracyclic oxindole alkaloid, speradine D ( 3 ), were isolated from the sponge derived fungus Aspergillus flavus MXH-X104. Among them, speradine C ( 2 ) possesses unprecedented 6/5/6/5/5/6 hexacyclic ring system and 4-oxo-1, 3-oxazinane ring. The structures including absolute configurations of 1 – 3 were deduced from the spectroscopic data, X-ray diffraction analysis and the computational method including the calculation of the chemical shifts and the electronic circular dichroism (ECD) spectra. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00404020
- Volume :
- 71
- Issue :
- 21
- Database :
- Academic Search Index
- Journal :
- Tetrahedron
- Publication Type :
- Academic Journal
- Accession number :
- 102454758
- Full Text :
- https://doi.org/10.1016/j.tet.2015.03.050