“…Triazole is a core structural moiety found in some important drugs like tazobactam, cefatrizine, carboxyamidotriazole and rufinamide. The most significant and current studies have discovered that 1,2,3-triazole derivatives exhibit a broad spectrum of pharmacological activity such as antimicrobial (Kushwaha et al, 2014), anti-inflammatory (Shafi et al, 2012), anticonvulsant (Ulloora et al, 2013), antituberculosis (Addla et al, 2014;Patpi et al, 2012;Yempala et al, 2014) and, in particular, anticancer (Akselsen et al, 2012;Howell et al, 2009;Pagliai et al, 2006) activity. Owing to the drug-like properties of 1,2,3-triazole derivatives and also based on the preliminary structure-activity information (Güven and Jones, 1993), we have planned to incorporate 1,2,3-triazole unit into the pyridazino [4,5-b]indole structure with an expectation that the amalgamation of these two active pharmacophores in a single molecular framework would enhance the efficacy of the hybrid molecule.…”