Abstract
Systemic administration of (Tyr-D-Ser(O-tert-butyl)-Gly-Phe-Leu-Thr(O-tert-butyl), a highly selective delta opioid agonist, induces mu receptor-mediated analgesia in mice.
A Baamonde, V Daugé, G Gacel and B P Roques
Journal of Pharmacology and Experimental Therapeutics May 1991, 257 (2) 767-773;