S17-150 Novel Ligands with Affinity for Opioid Receptors Researchers at Stanford have discovered new, chemically distinct opioid receptor ligands that may be used to develop safer opioid therapeutics. Opioids are ligands that bind to the mu, delta, and/or kappa opioid receptors. Evan Feinberg Vijay Pande Susruta Majumdar Gavril Pasternak