1. Department of Chemistry, Indiana University, 800 Kirkwood Avenue, Bloomington, Indiana 47401, United States
2. Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
3. Baxter Healthcare Corporation, 927 South Curry Pike, Bloomington, Indiana 47403, United States
4. Department of Chemistry, Hendrix College, Conway, Arkansas 72032, United States