Substituted Benzothiophene or Benzofuran Derivatives as a Novel Class of Bone Morphogenetic Protein-2 Up-Regulators: Synthesis, Structure−Activity Relationships, and Preventive Bone Loss Efficacies in Senescence Accelerated Mice (SAMP6) and Ovariectomized RatsHuifang Guo, Zhuorong Li, Zhaoyong Yang et al.|Journal of Medicinal Chemistry|2010Cited by 65