after the injections with bis ( 2-carboxyethyl ) -1,4-diaminobutane , spermidine , isoputreanine , putreanine , n- ( 2-carboxyethyl ) -4-amino-n-butyric acid , putrescine , 1,3-diaminopropane , beta-alanine , 2-hydroxyputrescine and possibly gamma-amino-n-butyric acid were recovered .
C0000392
beta-alanine
C0002520
amino