a new polyamine has been extracted from an extreme thermophile , thermus thermophilus , and its chemical structure was determined as 1,12-diamino-4,8-diazadodecane , nh2 ( ch2 ) 3nh ( ch2 ) 3nh ( ch2 ) 4nh2 , based on its proton nmr , 13c nmr , and mass spectra .
C0032433
polyamine
C0002508
nh2