Oleanolic acid induces relaxation and calcium-independent release of endothelium-derived nitric oxide. - Rodriguez-Rodriguez, R.; Stankevicius, E.; Herrera, M. D.; Østergaard, L.; Andersen, M. R.; Ruiz-Gutierrez, V.; Simonsen, U.; Ostergaard, L (British Journal of Pharmacology, 2008)