Polymorphs c)Metabolite d) Analysis and conclusion 3.

Nari Lee who was always standing by me, for her guidance, helps, insights on my thesis. I am also indebted to my tutor, Dr. Christof Karl who made available his support and guidance in a number of ways from the beginning to the last of my thesis. Special thanks goes to my office mate, Chen Xi, who was always willing to help and to give suggestions. It would have been a lonely office without her. I also benefitted a lot from conversations with Ilho Lee, Heeeun Kim, and Max Wallot, whom I thank for being always there.Lastly, I would like to thank my parents and my sister. They were always supporting and encouraging me with their best wishes from home. 5