Authors: Schiller, PW Berezowska, I Nguyen, TMD Schmidt, R Lemieux, C Chung, NN Falcone-Hindley, ML Yao, WQ Liu, J Iwama, S Smith, AB Hirschmann, R

Citation: Pw. Schiller et al., Novel ligands lacking a positive charge for the delta- and mu-opioid receptors, J MED CHEM, 43(4), 2000, pp. 551-559