Synthesis of a New Imidazo[4′,5′:3,4]pyrazolo[5,1-c][1,2,4]triazine-4,8-dione Heterocyclic System: Synthesis of a New Imidazo[4',5':3,4]pyrazolo[5,1-c][1,2,4]triazine-4,8-dione Heterocyclic System