Acknowledgement This work was supported by the National Natural Science Foundation of China (Nos. 90713038, 21072231, 30873157) and National Major Science and Technology Project of China (Innovation and Development of New Drugs. Nos. 2008ZX09401-001, 2009ZX09501-003).
Gambogic acid (GA, 1), the most prominent representative of Garcinia natural products, has been reported to be a promising anti-tumor agent. In order to further explore the structure-activity relationship of GA and ...