1. Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, People's Republic of China, Department of Pharmacognosy, University of Vienna, A-1090 Vienna, Austria, Institute of Organic Chemistry, University of Vienna, A-1090 Vienna, Austria, Institute of Pharmacy/Pharmacognosy, University of Innsbruck, A-6020 Innsbruck, Austria, and Laboratory of Toxicology, Institute of Pharmacy, Université Libre de Bruxelles, 1050 Brussels, Belgium