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Phytochemical and pharmacological investigations of Egyptian clover, Trifolium alexandrinum L.

In continuation of our studies on the phytoconstituents of the Trifolium species (Fabaceae-Trifolieae), mostly occurring in India and other parts of the world, we have examined Trifolium alexandrinum L., which is also known as Barseem or Egyptian clover. Its aerial part is used as hay or pasture and...

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Main Authors: Ahmed, Qamar Uddin, Kaleem, Mohammed, Parveen, Nazneen, Khan, Nizam Ud Din
Format: Conference or Workshop Item
Language:English
Published: Universiti Putra Malaysia dan Jabatan Perhutanan Semenanjung Malaysia 2006
Subjects:
Q Science (General)
Online Access:http://irep.iium.edu.my/68981/12/2006_Proceedings%20FRIM.pdf
http://irep.iium.edu.my/68981/
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spelling my.iium.irep.689812019-07-16T01:38:51Z http://irep.iium.edu.my/68981/ Phytochemical and pharmacological investigations of Egyptian clover, Trifolium alexandrinum L. Ahmed, Qamar Uddin Kaleem, Mohammed Parveen, Nazneen Khan, Nizam Ud Din Q Science (General) In continuation of our studies on the phytoconstituents of the Trifolium species (Fabaceae-Trifolieae), mostly occurring in India and other parts of the world, we have examined Trifolium alexandrinum L., which is also known as Barseem or Egyptian clover. Its aerial part is used as hay or pasture and seeds are used as an antidiabetic. Phytochemical data, obtained with several Trifolium species previously investigated, allowed the characterization of many secondary metabolites mainly consisting of flavonoids and aliphatic compounds structural types. The aim was to identify and characterize phenolic components in the leaves of T. alexandrinum for antimicrobial and antioxidant activities. Eight different flavonoids were detected after multistep chromatographic fractionation and preparative TLC using different solvent systems. The isolated flavonoids after purification from ethyl acetate extract were identified as 1) 5,7-dihydroxy-4'-O-methyl isoflavone, 2) 5,7,4'trihydroxy isoflavone, 3) 5,7,4'-trihydroxy flavone, 4) 5,7,3',4'-tetrahydroxy flavone, 5) apigenin 7-0-β-D-galactopyranoside, and 6) luteolin 7-0-β-glucoside by UV, IR, MS, IH-NMR, 13C-NMR analyses, direct comparison with their authentic samples and different chemical methods. Occurrence of monoflavonoids 3,4,5,6 from this plant is being reported for the first time. Further studies are still in progress to elucidate the structure of the remaining two phenolic compounds. The inhibitory potencies and capacities of different extracts against many gram positive and gram negative bacteria were also tested. Universiti Putra Malaysia dan Jabatan Perhutanan Semenanjung Malaysia 2006 Conference or Workshop Item PeerReviewed application/pdf en http://irep.iium.edu.my/68981/12/2006_Proceedings%20FRIM.pdf Ahmed, Qamar Uddin and Kaleem, Mohammed and Parveen, Nazneen and Khan, Nizam Ud Din (2006) Phytochemical and pharmacological investigations of Egyptian clover, Trifolium alexandrinum L. In: Proceedings of the International Conference on Medicinal Plants 2005, 5th-7th December 2005, Kuala Lumpur.
institution Universiti Islam Antarabangsa Malaysia
building IIUM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider International Islamic University Malaysia
content_source IIUM Repository (IREP)
url_provider http://irep.iium.edu.my/
language English
topic Q Science (General)
spellingShingle Q Science (General)
Ahmed, Qamar Uddin
Kaleem, Mohammed
Parveen, Nazneen
Khan, Nizam Ud Din
Phytochemical and pharmacological investigations of Egyptian clover, Trifolium alexandrinum L.
description In continuation of our studies on the phytoconstituents of the Trifolium species (Fabaceae-Trifolieae), mostly occurring in India and other parts of the world, we have examined Trifolium alexandrinum L., which is also known as Barseem or Egyptian clover. Its aerial part is used as hay or pasture and seeds are used as an antidiabetic. Phytochemical data, obtained with several Trifolium species previously investigated, allowed the characterization of many secondary metabolites mainly consisting of flavonoids and aliphatic compounds structural types. The aim was to identify and characterize phenolic components in the leaves of T. alexandrinum for antimicrobial and antioxidant activities. Eight different flavonoids were detected after multistep chromatographic fractionation and preparative TLC using different solvent systems. The isolated flavonoids after purification from ethyl acetate extract were identified as 1) 5,7-dihydroxy-4'-O-methyl isoflavone, 2) 5,7,4'trihydroxy isoflavone, 3) 5,7,4'-trihydroxy flavone, 4) 5,7,3',4'-tetrahydroxy flavone, 5) apigenin 7-0-β-D-galactopyranoside, and 6) luteolin 7-0-β-glucoside by UV, IR, MS, IH-NMR, 13C-NMR analyses, direct comparison with their authentic samples and different chemical methods. Occurrence of monoflavonoids 3,4,5,6 from this plant is being reported for the first time. Further studies are still in progress to elucidate the structure of the remaining two phenolic compounds. The inhibitory potencies and capacities of different extracts against many gram positive and gram negative bacteria were also tested.
format Conference or Workshop Item
author Ahmed, Qamar Uddin
Kaleem, Mohammed
Parveen, Nazneen
Khan, Nizam Ud Din
author_facet Ahmed, Qamar Uddin
Kaleem, Mohammed
Parveen, Nazneen
Khan, Nizam Ud Din
author_sort Ahmed, Qamar Uddin
title Phytochemical and pharmacological investigations of Egyptian clover, Trifolium alexandrinum L.
title_short Phytochemical and pharmacological investigations of Egyptian clover, Trifolium alexandrinum L.
title_full Phytochemical and pharmacological investigations of Egyptian clover, Trifolium alexandrinum L.
title_fullStr Phytochemical and pharmacological investigations of Egyptian clover, Trifolium alexandrinum L.
title_full_unstemmed Phytochemical and pharmacological investigations of Egyptian clover, Trifolium alexandrinum L.
title_sort phytochemical and pharmacological investigations of egyptian clover, trifolium alexandrinum l.
publisher Universiti Putra Malaysia dan Jabatan Perhutanan Semenanjung Malaysia
publishDate 2006
url http://irep.iium.edu.my/68981/12/2006_Proceedings%20FRIM.pdf
http://irep.iium.edu.my/68981/
_version_ 1643619826305859584
score 13.211869

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