1. Department of Chemistry, University of Alabama at Birmingham, 901 14th Street South, Birmingham, Alabama 35294, United States
2. Department of Neurosurgery, University of Alabama at Birmingham, 901 14th Street South, Birmingham, Alabama 35294, United States
3. Department of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, P. R. China
4. Department of Pediatric Dentistry, University of Alabama at Birmingham, 901 14th Street South, Birmingham, Alabama 35294, United States
5. Department of Microbiology, University of Alabama at Birmingham, 901 14th Street South, Birmingham, Alabama 35294, United States
6. The O’Neal Comprehensive Cancer Center, University of Alabama at Birmingham, 901 14th Street South, Birmingham, Alabama 35294, United States