Institution: | (1) Zhong-Guan Yuan, Peking University, Building 49-504, China;(2) Institut für Pharmazie, Universität Regensburg, 93040 Regensburg, FRG;(3) Departamento de Fisico-Quimica Farmacéutica, Facultad de Farmacia, Universidad Complutense, Madrid, Spain |