9-Hydroxy-alpha-lapachone can highly inhibit the growth of H. pylori, it exhibits potent inhibitory activity against H. pylori Cystathionine gamma-synthase, with IC(50) values of 4.64 microM. It may have anti-inflammatory activity, it exhibits potent inhibitory effects on lipopolysaccharide- induced NO synthesis in RAW 264.7 cells, with IC50 values of 4.64 microM.