Mateus, Maria Da ConceiçãoNeves, DinaDacunha, BrunoLaczko, EndreMaia, CristianaTeixeira, RúbenCravador, Alfredo2017-04-072017-04-072016-070031-9422AUT: ACR00659; MCM00289;http://hdl.handle.net/10400.1/9232To investigate bioactive compounds potentially involved in the biotic interactions exhibited by Phlomis purpurea (Lamiaceae) in rhizospheres infested with Phytophthora cinnamomi, the plant rhizome was chemically analysed. The nortriterpenoid (175)-2 alpha,3 alpha,11 alpha,23,24-pentahydroxy-19(18 -> 17)-abeo-28-norolean-12-en-18-one, was isolated and its structure was elucidated by comprehensive spectroscopic analysis, chiefly using 2D NMR experiments, and X-ray analysis. It was shown to be exuded by roots and to exhibit anti-Phytophthora and antitumor activities. (C) 2016 Published by Elsevier Ltd.engjournal article10.1016/j.phytochem.2016.09.004