S31 The Origin and Future of Organic Chemistry in Pharmaceutical Sciences S31-1 Three "One-Pot" Synthesis of (-)-Oseltamivir S31-2 Synthetic Study on (-)-Cercosporamide Derivatives as Novel Anti-diabetic Agents S31-3 Regulation of Gene Transcription by Small Synthetic Molecules S31-4 Discovery of selective antagonists for prostaglandin E2 receptor subtype EP1 S31-5 Approaches to cancer cells based on natural products S31-6 Design and synthesis of a novel class of anti-HIV peptides against drug-resistant strains