1. Division of Medicinal Chemistry and Natural Products, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina 27599-7568, United States
2. Michael Barber Centre for Mass Spectrometry, Manchester Interdisciplinary Biocentre, University of Manchester, 131 Princess Street, Manchester M1 7DN, United Kingdom
3. Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom
4. Carolina Center for Genome Sciences, University of North Carolina, Chapel Hill, North Carolina 27599-7264, United States
5. Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599-3290, United States