1. Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
2. Department of Pharmaceutical Sciences, College of Pharmacy, University of New Mexico, Albuquerque, New Mexico 87131, United States
3. Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27109, United States
4. Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de México 04510, México