GSA-10 is a potent agonist of Smoothened (Smo) receptor with an EC50 of 1.2 μM. GSA-10 is a novel quinolinecarboxamide derivative. GSA-10 acts at Smo to promote the differentiation of multipotent mesenchymal progenitor cells into osteoblasts. GSA-10 mediates Hedgehog (Hh) signaling which may have researching interests in regenerative medicine for cancer disease.