1,4-Butanediamine, N,N'-bis(3-aminopropyl)-, tetrahydrochloride 1,4-Butanediamino, N,N'-bis(3-aminopropyl), tetrahydrochloride 306-67-2 N,N'-Bis(3-aminopropyl)-1,4-butanediamine tetrahydrochloride NSC69852 SPERMINE, TETRAHYDROCHLORIDE Spermine hydrochloride Spermine tetrahydrochloride