Hybrid Molecule from <i>O</i><sup>2</sup>-(2,4-Dinitrophenyl)diazeniumdiolate and Oleanolic Acid: A Glutathione <i>S</i>-Transferase π-Activated Nitric Oxide Prodrug with Selective Anti-Human Hepatocellular Carcinoma Activity and Improved Stability
A series of hybridsfromO2-(2,4-dinitrophenyl)diazeniumdiolate and oleanolicacid (OA) were designed, synthesized, and biologically evaluated as novel nitricoxide (NO)-releasing prodrugs that could be activated by glutathioneS-transferase π (GSTπ) overexpressed in a number of cancer cells. It was discovered that the most active compound, 21, released high levels of NO selectively in HCC cells but