title: Lipophilic Constituents of Rumex vesicarius L. and Rumex dentatus L.
abstract: Rumex dentatus L. and Rumex vesicarius L., of the family Polygonaceae, are edible herbs growing wild in Egypt. Their lipoid constituents were examined by both liquid chromatography/mass spectrometry (LC/MS) and by gas chromatography/mass spectrometry (GC/MS). Their essential oil compositions consisted mainly of thujene, limonene, fenchon, estragole, and anethole but at largely different concentration. Fatty acid compositions were similar among the two species and consisting of palmitic, oleic, linoleic and linolenic acids, with R. vesicarius containing much higher level of omega-3-fatty acids. Both of the crude lipid extracts of the two species showed strong antioxidant activity as a radical quenching agent against 2,2-diphenyl-1-picrylhydrazyl (DPPH) systems. Antioxidant activities were mostly associated with the polar lipid fractions. High performance thin layer chromatography (HPTLC), both in the normal and reversed phase,as well as liquid chromatography/mass spectrometry (LC/MS) in the positive and negative electrospray ionization (ESI), showed unique chemical profile for each species that can be useful for species identification and quality control of herbal drug formulations. R. vesicarius was characterized by abundances of flavonoids and R. dentatus was abundant in anthraquinones and chromones.
authors.affiliation: Department of Phytochemistry, National Research Center, 12311 Dokki, Cairo, Egypt. monaaboelfetoh_nrc@yahoo.com.
authors.forename: Mona A Abou
authors.initials: MA
authors.lastname: Elfotoh
authors.affiliation: Department of Phytochemistry, National Research Center, 12311 Dokki, Cairo, Egypt. khaledashams@yahoo.com.
authors.forename: Khaled A
authors.initials: KA
authors.lastname: Shams
authors.affiliation: Department of Chemistry, Texas Southern University, Houston, TX 77004, USA. anthonykp@tsu.edu.
authors.forename: Kevin P
authors.initials: KP
authors.lastname: Anthony
authors.affiliation: Department of Phytochemistry, National Research Center, 12311 Dokki, Cairo, Egypt. aashahat@hotmail.com.
authors.forename: Abdelaaty A
authors.initials: AA
authors.lastname: Shahat
authors.affiliation: Department of Pharmacognosy, Faculty of Pharmacy, Al-Azhar University (Girls), Cairo, Egypt. magda.tohamy_1963@windowslive.com.
authors.forename: Magda T
authors.initials: MT
authors.lastname: Ibrahim
authors.affiliation: Department of Pharmacognosy, Faculty of Pharmacy, Al-Azhar University (Girls), Cairo, Egypt. nevein_abdelhady@yahoo.com.
authors.forename: Nevein M
authors.initials: NM
authors.lastname: Abdelhady
authors.affiliation: Department of Phytochemistry, National Research Center, 12311 Dokki, Cairo, Egypt. nahlaabdelazim@yahoo.com.
authors.forename: Nahla S Abdel
authors.initials: NS
authors.lastname: Azim
authors.affiliation: Department of Phytochemistry, National Research Center, 12311 Dokki, Cairo, Egypt. fmhammouda@yahoo.com.
authors.forename: Faiza M
authors.initials: FM
authors.lastname: Hammouda
authors.affiliation: Department of Phytochemistry, National Research Center, 12311 Dokki, Cairo, Egypt. missirym@yahoo.com.
authors.forename: Mostafa M
authors.initials: MM
authors.lastname: El-Missiry
authors.affiliation: Department of Chemistry, Texas Southern University, Houston, TX 77004, USA. saleh_ma@tsu.edu.
authors.forename: Mahmoud A
authors.initials: MA
authors.lastname: Saleh
keywords: Egypt; antioxidants; flavonoids; omega fatty acids; quinones