... of 1,4-benzodiazepine 2 and exhi- bited pharmacologically potent CNS activities (2). N-CCH,NHCCHNH, О R CONR.Rj 1МЛМ \ J f-4r"N ... Figure 1 Introduction of a heterocyclic ring to the amide moiety in 2 is often used for chemically modifying 2, eg, for ob- taining ... Chemistry. ...