2601-99-2 HR 2315 NSC70689 Urea, 1,1'-trimethylenebis[3-(p-2-imidazolin-2-ylphenyl)-,dihydrochloride Urea, N,N''-1,3-propanediylbis[N'-[4-(4,5-dihydro-1H-imidazol-2-yl)phenyl]-,dihydrochloride