1. College
of Pharmacy, Korea University, 2511 Sejong-ro, Sejong 339-700, Republic of Korea
2. SSCI, a Division of AMRI, 3065
Kent Avenue, West Lafayette, Indiana 47906, United States
3. Department
of Chemistry, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 305-746, Republic of Korea