Investigations of the pharmacological properties of carvotacetones isolated from Sphaeranthus africanus - Tran, HT; Pferschy-Wenzig, EM; Kretschmer, N; Gao, X; Raab, P; Pirker, T; Solnier, J; Bucar, F; Kunert, O; Tuenter, E; Pieters, L; Huynh, L; Bauer, R (Planta Medica, 2019)