Analysis of the mechanisms underlying the vasorelaxant action of the pimarane ent-8(14),15-pimaradien-3B-OL in the isolated rat aorta - Hipolito, U. V.; Ambrosio, S. R.; Costa, Fernando Batista da; Oliveira, Ana Maria de; Tirapelli, Carlos Renato (Congresso Brasileiro de Farmacologia e Terapêutica Experimental, 2007)