1. Division of Hematology-Oncology, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15232, USA
2. Cancer Therapeutics Program, University of Pittsburgh Cancer Institute, University of Pittsburgh, Pittsburgh, PA 15213, USA
3. Department of Chemistry, School of Pharmaceutical Science, Southern Medical University, Guangzhou 510515, China
4. Department of Nephrology, NanFang Hospital, Southern Medical University, Guangzhou 510515, China
5. Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA