1. Beijing National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education College of Chemistry and Molecular Engineering; Peking University; Beijing China
2. Department of Chemistry; University of California; Berkeley CA 94720 USA
3. Merck Research Laboratories; 2015 Galloping Hill Road Kenilworth NJ 07033 USA
4. State Key Laboratory of Elemento-Organic Chemistry; Nankai University; Tianjin China