BMD4503-2 is a quinoxaline derivative with inhibitory activity against LRP5/6-sclerostin interactions. BMD4503-2 restores the activity of the Wnt/β-catenin signaling pathway by competitively binding to the LRP5/6-sclerostin complex. BMD4503-2 can be used in the study of Wnt signaling pathways in bone development, maintenance and osteoporosis[1].