1,2,4,5,10b,10c-hexahydropyrrolo[1',2',3':1,9a,9]imidazo[1,2-a]indole, a novel tetraheterocyclic system: Studies toward indole alkaloid analogues

1. González-Vera, J.A.
2. Ventosa-Andrés, P.
3. García-López, M.T.
4. Herranz, R.