Tribulusamide A and B, new hepatoprotective lignanamides from the fruits of Tribulus terrestris: indications of cytoprotective activity in murine hepatocyte culture. - Li ,J.X,.; Shi ,Q,.; Xiong ,Q.B,.; Prasain ,J.K,.; Tezuka ,Y,.; Hareyama ,T et al.. (Planta Med., 1998)