Terpenoids of Salvia hydrangea: Two New, Rearranged 20-Norabietanes and the Effect of Oleanolic Acid on Erythrocyte Membranes - Sairafianpour, Majid; Bahreininejad, Babak; Witt, Matthias; Ziegler, Hanne L; Jaroszewski, Jerzy W; Stærk, Dan (Planta Medica, 2003)