Pharmacological comparison of the vasorelaxant action displayed by kaurenoic acid and pimaradienoic acid - Tirapelli, Carlos Renato; Ambrosio, Sérgio Ricardo; Coutinho, Silvia T.; Oliveira, Dionéia Camilo Rodrigues de; Costa, Fernando Batista da; Oliveira, Ana Maria de (Journal of Pharmacy and Pharmacology, 2005)