Journal
TETRAHEDRON LETTERS
Volume 47, Issue 34, Pages 6099-6102Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2006.06.086
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Three new benzodiazepines have been isolated from an unusual chemotype of Aspergillus novofumigatus: epi-aszonalenins A, B, and C. The structures were elucidated by use of one- and two-dimensional NMR spectroscopic techniques and HR ESI MS. The relative configuration was established on the basis of a single crystal X-ray diffraction study of epi-aszonalenin A and the absolute configuration was determined by optical rotation comparison with the literature data. The absolute configurations of epi-aszonalenins B and C were determined by circular dichroism comparison to epi-aszonalenin A. (c) 2006 Elsevier Ltd. All rights reserved.
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