1. Australian Centre for Research on Separation Science, School of Applied Sciences, RMIT University, GPO Box 2476, Melbourne 3001, Australia, School of Chemistry, University of Tasmania, Hobart, Tasmania 7001, Australia, Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria 3168, Australia, and College of Pharmacy (WCU), Chung-Ang University, Seoul 156-756, Republic of Korea