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The cytotoxic activity of Linum grandiflorum leaves Mohammed, Magdy Mostafa Desoky Chen, Ming Zhai, Lin Ibrahim, Nabaweya Ali Linum grandiflorum Desf. Linaceae Flavonoids glycosides Cyanogenic glycosides Lignans Cytotoxicity Murine Leukemia (EL4) The CHCl3 and MeOH fractions of the leaves of Linum grandiflorum, showed cytotoxic activity against EL4 (Murine Leukemia) cell line with IC50 = 60 and 250 mg/mL respectively. Bioassay guided fractionation and isolation (BGFI) of the MeOH fraction resulted in the isolation of two new cytotoxic compounds 1 [luteolin 7-O-α-D-(6```-E-feruloyl)glucopyranosyl (1→2)-β-D-glucopyranoside] and 6 [2-[(3`-isopropoxy-O-β-D-glucopyranosyl)oxy]-2-methylbutane nitrile] against EL4 with IC50 = 0.2 and 0.3 mM/mL respectively, together with 2 [luteolin 7-O-β-D-glucopyranoside], 3 [vicenin-1], 4 [vicenin-2], 5 [vicenin-3], 7 [linamarin], 8 [lotaustralin], 9 [neolinustatin], and  10 [butan-2-O-β-D-glucopyranoside] which showed cytotoxicity against EL4 with IC50 = 0.2, 0.9, 0.8, 0.9, 0.4, 0.4, 0.2, 0.4 mM/mL respectively. BGFI of the CHCl3 fraction revealed the isolation of three cytotoxic aryltetrahydronaphthalene-type lignans identified as 11 [podophyllotoxin], 12 [deoxypodophylotoxin] and 13 [5-methoxypodophyllotoxin] against EL4 with IC50 = 0.2, 0.09 and 0.2 mM/mL respectively. The isolated compounds were structurally elucidated using 1D, 2D NMR, HR-ESI-MS, and HR-MALDI-MS techniques. Atlanta Publishing House LLC 2010-06-15 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://www.eurjchem.com/index.php/eurjchem/article/view/74 10.5155/eurjchem.1.2.110-114.74 European Journal of Chemistry; Vol. 1 No. 2 (2010): June 2010; 110-114 2153-2257 2153-2249 eng https://www.eurjchem.com/index.php/eurjchem/article/view/74/PDF