(Tph-1), the principal enzyme for peripheral serotonin biosynthesis, provides a novel target to design anabolicagents for osteoporosis. Here, we present a design, synthesis of a novel series of ursolic acidderivatives under the guidance of docking technique, and bioevaluation of the derivatives using RBL2H3 cells and ovariectomized (OVX) rats. Of the compounds, 9a showed a potent inhibitory activity