Kaurenoic acid from Sphagneticola trilobata inhibits inflammatory pain: effect on cytokine production and activation of the NO–Cyclic GMP–protein kinase G–ATP-sensitive potassium channel signaling pathway - Mizokani, Sandra S.; Arakawa, Nilton Syogo; Ambrosio, Sérgio Ricardo; Zarpelon, Ana C; Casagrande, Rúbia; Cunha, Tiago Mattar; Ferreira, Sérgio Henrique; Cunha, Fernando de Queiroz; Verri Júnior, Waldiceu Aparecido (Journal of Natural Products, 2012)