.alpha.,.omega.-Butanediamine 1,4-Butanediamine 1,4-Butylenediamine 1,4-Diamino-n-butane 1,4-Diaminobutane 1,4-Tetramethylenediamine 110-60-1 333-93-7 (DIHYDROCHLORIDE) AIDS-081098 AIDS081098 Putrescin Putrescine Tetramethylenediamine