1 Department of Chemistry, The University of North Carolina at Charlotte, Charlotte, NC 28223, USA. Electronic address: kafonin@uncc.edu.
2 Department of Pharmacology, Penn State College of Medicine, Hershey, PA 17033-0850, USA; Department of Biochemistry & Molecular Biology, Penn State College of Medicine, Hershey, PA 17033-0850, USA. Electronic address: nxd338@psu.edu.