1. Department of Pharmaceutical
Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
2. Biopharmaceutical Research Group
I, Biopharmaceutical Technology Research Laboratories, Pharmaceutical
Technology Division, Daiichi Sankyo Co., Ltd., Gunma 370-0503, Japan
3. Department of Chemistry, University of Paderborn, Paderborn 33098, Germany