50608-63-4 6-Methyl-1,2,3,5-tetrahydroimidazo(2,1-b)quinazolin-2-one hydrochloride BL 3459 BL-3459 Imidazo(2,1-b)quinazolin-2(3H)-one, 1,5-dihydro-6-methyl-, monohydrochloride NSC 288022