A Thin Wideband Radar Absorber Based on a Dual-Substrate FSS with Quadruple Hexagonal Split Rings for Stealth Aircraft Application
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Publication Details
Author list: Charoonsaeng P., Theeradejvanichkul T.
Publisher: Taylor and Francis Ltd.
Publication year: 2019
Volume number: 35
Issue number: 14
Start page: 111
End page: 114
Number of pages: 4
ISSN: 1478-6419
eISSN: 1478-6419
Languages: English-Great Britain (EN-GB)
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Abstract
A new labdane-type diterpenoid, named vitexnegundin (1), along with seven known compounds, including vitexilactone (2), vitetrifolin D (3), 13-hydroxy-5(10),14-halimadien-6-one (4), (rel 3S,5S,8R,9R,10S)-3,9-dihydroxy-13(14)-labden-16,15-olide (5), artemetin (6), vitexcarpin (7) and penduletin (8), were isolated from the leaves of Vitex negundo L. Their structures were elucidated by using spectroscopic methods, X-ray crystallographic analysis and comparison with those reported in the literature. Moreover, all isolated compounds 1–8 were evaluated for their antimicrobial activity against ESBL-producing Escherichia coli strain and methicillin-resistant Staphylococcus aureus. © 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group.
Keywords
labdane-type diterpenoid, vitexnegundin, Vitex negundoL
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