1. Department of Chemistry and
Biochemistry, University of California, Santa Cruz, California 95064, United States
2. The National Museum of Natural History, 2300 RA Leiden, The Netherlands
3. Eisai Inc., 4 Corporate Drive, Andover, Massachusetts 01810, United States
4. QB3/Chemistry Mass Spectrometry
Facility, University of California, Berkeley, California 94720, United States