Anti-urease Secondary Metabolites from Seriphidium quettense
Muhammad Imran Tousif, Naheed Riaz, Mamona Nazir, Shabir Ahmad, Muhammad Saleem, Abdul Jabbar, Muahammad Ashraf and Rasool Bakhsh Tareen
Department of Chemistry, Baghdad-ul-Jadeed Campus, The Islamia University of Bahawalpur, 63100 Bahawalpur, Pakistan
Department of Chemistry, Dera Ghazi Khan Campus, University of Education Lahore, Dera Ghazi Khan, Pakistan
Department of Chemistry, The Government Sadiq College Women University, Bahawalpur, 63100 Bahawalpur, Pakistan
Institute for Pharmaceutical Biology, Nussalle 6, University of Bonn, 53115 Bonn, Germany
Department of Chemistry, Post-Graduate College, University Road Bahawalpur, 63100 Bahawalpur, Pakistan
Department of Botany, University of Baluchistan, Quetta, Pakistan
Abstract: Ethyl acetate layer of the methanolic extract of Seriphidium quettense was subjected to silica gel column chromatography to isolate one new; seriphiloid (1), and four known compounds; ilicic acid (2), 6 a -hydroxy-8(10)-oplopen-14-one (3), 2-(4-hydroxyphenyl)-5,6,7-trimethoxy-4H-chromen-4-one (4) and 2-(3,4-dihydroxyphenyl)-5,6,7-trimethoxy-4H-chromen-4-one (5). The chemical structure of the new isolate was established with the help of 1D, 2D NMR techniques and high resolution mass spectrometry. Known compounds were identified because of 1D NMR and mass spectrometric analysis and in comparison with the literature values. Compounds 1-5 were evaluated for their acetylcholinesterase, butyrylcholinesterase, a -glucosidase and urease inhibitory activities. Most of the metabolites were found inactive; however, compounds 2 and 3 showed good antiurease activity with IC 50 value 21.5±0.1 and 20.8±0.1 µg/mL, respectively.
Keywords:Seriphidium quettense; secondary metabolites; structure elucidation; enzyme inhibition. © 2016 ACG Publications. All rights reserved.