%0 Journal Article %T Synthesis of [1,2,4]triazolo[4′′,3′′:1′,6′]pyrimido[4′,5′:3,4]pyridazino[1,6-d ] [1,2,4]triazine; a novel tetracyclic system %A Hazrathoseyni, Ayla %A Seyedi, Seyed Mohammad %A Shiri, Ali %A Eshghi, Hossein %J Journal of Chemical Research %@ 1747-5198 %D 2015