Hypotensives, antispasmodics, tranquilizers, and antitumor agents have been found among the pyrrolo-and indolobenzdiazepines [5, 7-9]. The diazepine ring in these compounds is directly coupled to the pyrrole ring. In an earlier studies [i, 6] we reacted l-acetyl-5, 6- diaminoindoline (I) with acetoacetic ester to obtain tetrahydrodiazepino [2, 3-f] indole (II) which appeared to be a potential pharmacologically active substance within whose ...