A secondary metabolite amberin from Amberboa ramosa

Muhammad Ibrahim Department of Chemistry, University of Karachi, Karachi, 75270, Pakistan

Muhammad Imran International Centre for Chemical and Biological Sciences, HEJ Research Institute of Chemistry, University of Karachi, Karachi, 75270, Pakistan

Bakhat Ali Department of Chemistry, University of Science and Technology Bannu, Bannu, 28100, Pakistan

Riaz Hussain International Centre for Chemical and Biological Sciences, HEJ Research Institute of Chemistry, University of Karachi, Karachi, 75270, Pakistan

Fouzia Sultana Rehmani Department of Chemistry, University of Karachi, Karachi, 75270, PakistanCorrespondence[email protected]

Abdul Malik International Centre for Chemical and Biological Sciences, HEJ Research Institute of Chemistry, University of Karachi, Karachi, 75270, Pakistan

Abstract

Amberin (1), a new sesquiterpene lactone, has been isolated from the ethyl acetate soluble fraction of Amberboa ramosa together with apigenin (2), jaseocidine (3), crysoeriol (4), and 3β, 8α-dihydroxy-11α-methyl-1αH, 5αH, 6βH, 7αH, 11βH-guai-10(14), 4 (15)-dien-6, 12-olide (5). The structures of the isolated compounds have been elucidated by 1D and 2D NMR spectroscopy.

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A secondary metabolite amberin from Amberboa ramosa

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A secondary metabolite amberin from Amberboa ramosa

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