The trypanocidal action of eupomatenoid-5 isolated from Piper regnellii var. pallescens may be related to an imbalance between the antioxidant system and ROS - Pelizzaro-Rocha, K; Veiga-Santos, P; Rocha, K; Silva, S; Ueda-Nakamura, T; Dias Filho, B; Ximenes, V; Nakamura, C (Planta Medica, 2010)