1. Department of Chemistry, Ludwig‐Maximilians‐Universität, Butenandtstr. 5–13, 81377 München, Germany, Fax: +49‐89‐2180‐77492, http://www.chemie.uni‐muenchen.de/ac/klapoetke/
2. Brodarski Insitute, Marine Research & Special Technologies, Av. V. Holjevca 20, 10000 Zagreb, Croatia