Synthesis, and structural, conformational and pharmacological studies of new fentanyl derivatives of the norgranatane system

1. Fernández, M.J.
2. Huertas, R.M.
3. Gálvez, E.
4. Orjales, A.
5. Berisa, A.
6. Labeaga, L.
7. Gago, F.
8. Fonseca, I.
9. Sanz-Aparicio, J.
10. Cano, F.H.
11. Albert, A.
12. Fayos, J.