1. Laboratory of Organic Chemistry, ETH Zurich, 8093 Zurich, Switzerland
2. Department of Chemistry and
Biochemistry, University of California, Los Angeles, California 90095, United States
3. Department
of Biochemistry, Ludwig-Maximilians-Universität München, 81377 München, Germany
4. Department of Biochemistry,
Robert Wood Johnson Medical School, University of Medicine and Dentistry of New Jersey, Piscataway, New Jersey
08854, United States