1. University of Arizona BIO5 Institute, 1657 East Helen Street, Tucson, Arizona 85721-0240, United States
2. Department of Pharmacy, School of Chemistry, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
3. Department of Life Science Informatics, B-IT LIMES Program Unit Chemical Biology and Medicinal Chemistry, Rheinische Friedrich-Wilhelms-Universität, Endenicher Allee 19c, Bonn D-53115, Germany