Cytotoxic and Antibacterial Constituents from the Roots of Sonchus oleraceus L. Growing in Egypt

Phytochemical study of the roots of Sonchus oleraceus L. (Astraceae) Growing in Egypt, afforded loliolide 1 for the first time from the genus Sonchus in addition to 15-O- β -glucopyranosyl-11 β ,13-dihydrourospermal A 2 , ursolic acid 3 , lupeol 4 and β-sitosterol- 3-O-glucopyranoside 5 for the fi rst time from the plant. The biological evaluation of the isolated compounds showed cytotoxic activity of 1 and 2 against PC33 and L5187Y cell lines, in addition to antibacterial activity against S.aureus , B. subtilis , E. Coli and N. gohnorea . The structures of the compounds were elucidated using 1D ( ¹ H and ¹³C), 2D (H-H COSY, H S QC and HMBC) NMR and MS spectroscopic data.