Affiliation: | 1. Department Chemie und Biochemie, Ludwig‐Maximillians‐Universit?t München, Butenandtstrasse 5‐13, 81377 München (Germany), Fax: (+49)?89‐2180‐77680, Homepage: http://www.knochel.cup.uni‐muenchen.de/;2. State Key Laboratory of Elemento‐Organic Chemistry, Nankai University, Tianjin 300071 (China) |