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

1. Baamonde, A.
2. Dauge, V.
3. Gacel, G.
4. Roques, B.P.