1. Department of Biochemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, RJ 21941909, Brazil
2. Department of Chemistry and Biochemistry, College of Medicine, University of Arizona, Tucson, Arizona 85721, United States
3. National Center for Nuclear Magnetic Resonance Jiri Jonas, Institute of Medical Biochemistry, Federal University of Rio de Janeiro, Rio de Janeiro, RJ 21941902, Brazil