Research ArticleBEHAVIORAL PHARMACOLOGY
The Opioid Receptor Like-1 Receptor Agonist Ro 64-6198 (1S,3aS-8-2,3,3a,4,5,6-Hexahydro-1H-phenalen-1-yl-1-phenyl-1,3,8-triaza-spiro[4.5]decan-4-one) Produces a Discriminative Stimulus in Rats Distinct from That of a μ, κ, and δ Opioid Receptor Agonist Cue
Matthew D. Recker and Guy A. Higgins
Journal of Pharmacology and Experimental Therapeutics November 2004, 311 (2) 652-658; DOI: https://doi.org/10.1124/jpet.104.071423