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Ahmed A. Mahmoud
Researcher at Minia University
Publications - 44
Citations - 592
Ahmed A. Mahmoud is an academic researcher from Minia University. The author has contributed to research in topics: Jasonia & Monoterpene. The author has an hindex of 13, co-authored 42 publications receiving 530 citations. Previous affiliations of Ahmed A. Mahmoud include Gifu Pharmaceutical University.
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Journal ArticleDOI
New Sesquiterpene α-Methylene Lactones from the Egyptian Plant Jasonia candicans
Ahmed A. Ahmed,Ahmed A. Mahmoud,Howard J. Williams,A I Scott,Joseph H. Reibenspies,T.J. Mabry +5 more
TL;DR: In this article, two new diol alpha-methylene lactone antimicrobial agents were identified from nmr and mass spectral data and X-ray crystallography as (4 alpha, 5 alpha, 8 beta, 10 beta)-4,10-dihydroxyl-1,11 (13)-guaidien-12,8-olide, which differ in stereochemistry at the C-10 tertiary alcohol center.
Journal ArticleDOI
Two highly oxygenated eudesmanes and 10 lignans from Achillea holosericea.
Ahmed A. Ahmed,Ahmed A. Mahmoud,Eptehal T. Ali,Olga Tzakou,Maria Couladis,Tom J. Mabry,Tamás Gáti,Gábor Tóth +7 more
TL;DR: Two new highly oxygenated eudesmanes and 10 known lignans were isolated from the aerial parts of Achillea holosericea by extensive application of one- and two-dimensional 1H and 13C NMR spectroscopy.
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7-Epi-eudesmanes, eudesmanoic acids, eudesmanolides and other sesquiterpenes from Pluchea dioscoridis
TL;DR: In this article, the chemical constituents of leaves of Pluchea dioscoridis were re-examined and seven new sesquiterpene derivatives (two 7-epi-eudesmanes, two eudesmanoic acids, a Eudesmanolide, a guaiane and a xanthane epoxide) were found.
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Diterpenoid quinones from Rosemary (Rosmarinus officinalis L.)
TL;DR: The structures of the new compounds were determined by extensive spectroscopic analysis, including IR, UV, HR-EIMS, 1D and 2D 400 MHz NMR data (1H, 13C NMR, DEPT, 1H-1H COSY, HMQC, HMBC and NOEs).
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Eudesmane derivatives from Laggera crispata and Pluchea carolonesis
Ahmed A. Ahmed,Hesham R. El-Seedi,Ahmed A. Mahmoud,Abd El-Aziz A. El-Douski,Ibrahim F. Zeid,Lars Bohlin +5 more
TL;DR: In this article, the aerial parts of Laggera crispata and Pluchea carolonesis were investigated and three new eudesmane derivatives, 3β,4α-dihydroxy-7-epi-eudesm-11(13)-ene, 3α-(2′,3′-dhydrox-2′-methylbutanoyl)-4,11-doglobalamide-6,7-dehydroeudesman-8-one and 3α-chloro-2-hydroxy-2