1. Department of Chemistry and Biochemistry, National Chung Cheng University, 168 University Road, Min-Hsiung, Chiayi 62102, Taiwan
2. Department of Chemistry, National Dong Hwa University, 1, Section 2, Da Hsueh Road, Shoufeng, Hualien 97401, Taiwan
3. Department of Chemistry, National Taiwan University, 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan