S-20 Medicinal Chemistry TODAY – Progress in Industry and Academia – S20-1 Synthesis and SAR of a New Class of Tetrahydroquinoline Derivatives as Potent and Selective SSTR2 Agonists 　 S20-2 Novel 5-HT3 Receptor Partial Agonists for the Treatment of d-IBS S20-3 Discovery of a novel hyaluronic acid-MTX conjugate (DK226) for Osteoarthritis S20-4 Development of Antitumor Seeds via Structure-based Drug Design S20-5 Synthesis and Biological Evaluation of Novel Peripherally Selective Androgen Receptor Antagonists