In:
Zeitschrift für Naturforschung B, Walter de Gruyter GmbH, Vol. 70, No. 9 ( 2015-9-1), p. 625-630
Abstract:
A new dimeric naphtho- γ -pyrone, 2-hydroxydihydronigerone ( 1 ), along with five compounds, nigerone ( 2 ), pyrophen ( 3 ), kojic acid ( 4 ), 4-(hydroxymethyl)-5-hydroxy-2 H -pyran-2-one ( 5 ), and p -hydroxyphenylacetic acid ( 6 ), was isolated from an endophytic fungus Aspergillus niger AKRN associated with the roots of Entandrophragma congoënse . The structure of the new compound has been elucidated using spectroscopic data including 1D and 2D NMR as well as the high-resolution mass spectrometry. Compounds 1 – 5 showed weak antimicrobial activity on five selected Gram-negative bacteria, namely Enterobacter aerogenes (CM64), Enterobacter cloacae (BM67), Klebsiella pneumonia (K2), and Escherichia coli (ATCC8739 and ATCC10536).
Type of Medium:
Online Resource
ISSN:
1865-7117
,
0932-0776
DOI:
10.1515/znb-2015-0036
Language:
English
Publisher:
Walter de Gruyter GmbH
Publication Date:
2015
detail.hit.zdb_id:
2078109-X
detail.hit.zdb_id:
124635-5
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