1. Department of Pharmacy, Children's Hospital Affiliated to Zhengzhou University, Zhengzhou, Henan 450017, China
2. Department of Pharmacy, Henan Provincial Hospital, Zhengzhou, Henan 451161, China
3. Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-Ku, Kyoto 606-8502, Japan