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, [UNESP]; Nakamura, C. (Georg Thieme Verlag Kg, 2010)