?Imidazo[1,2-b]pyridazine?(CAS NO.766-55-2) is also called as 1,5-Diazaindolizine ; Imdazo1,2-bpyridazine ;?Imidazo1,2-pyridazine ; Imidazo[1,2-b]pyridazine hemi-hydrate .