Cytotoxic activity of polyacetylenes and polyenes isolated from roots of Echinacea pallida - Chicca, A; Pellati, F; Adinolfi, B; Matthias, A; Massarelli, I; Benvenuti, S; Martinotti, E; Bianucci, A M; Bone, K; Lehmann, R; Nieri, P (Br J Pharmacol, 2008)