(2α,3β)-2,3-Dihydroxyolean-12-en-28-oic acid, a new natural triterpene from Olea europea, induces caspase dependent apoptosis selectively in colon adenocarcinoma cells. - Reyes,F.J.; Centelles,J.; Lupianez,J.A.; Cascante,M. (FEBS Lett, 2006)