Ring Substituted and Other Conformationally Constrained Tyrosine Analogues of [d-Pen2,d-Pen5]enkephalin with δ Opioid Receptor Selectivity

1. Russell, K.C.
2. Landis, G.
3. Kramer, T.H.
4. Fang, L.
5. Knapp, R.
6. Davis, P.
7. Burks, T.F.
8. Yamamura, H.I.
9. Hruby, V.J.
10. Toth, G.