111679-06-2 2,9-Dihydro-9-propyl-3H-imidazo(1,2-a)benzimidazole monohydrochloride 3H-Imidazo(1,2-a)benzimidazole, 2,9-dihydro-9-propyl-, monohydrochloride 9-Propyl-2,3-dihydroimidazo(1,2-a)benzimidazole hydrochloride