of dalbergin have been described via the introduction of cyclic amine, ester and amide groups. Among the twenty-three prepared novel analogues of dalbergin, compound 4d (EC50 2.3μM) showed significantly increased proliferation as assessed by alkaline phosphatase activity and mineralization in calvarial osteoblast cells in vitro. Compound 4d, at a dose of 1.0mg/kg body weight exhibited the significant