1. Department of Chemistry and Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nikolaus-Fiebiger-Str. 10, 91058 Erlangen, Germany
2. School of Chemistry and Biomedical Sciences Research Complex, University of St. Andrews and EaStCHEM North Haugh, St Andrews KY16 9ST, Fife, United Kingdom