1. Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556-5670, USA
2. Omicron Biochemicals, Inc., South Bend, IN 46617, USA
3. Molecular Structure Facility, University of Notre Dame, Notre Dame, IN 46556-5670, USA
4. Radiation Laboratory, University of Notre Dame, Notre Dame, IN 46556-5670, USA