The design and synthesis of SpmTrien (1,12-diamino-3,6,9-triazadodecane), an isosteric and charge-deficient analogue of spermine with excellent chelating properties towards Cu2+ ions, as well as novel N1- and N12-Ac-SpmTriens and bis-Et-SpmTrien (N1,N12-diethyl-1,12-diamino-3,6,9-triazadodecane) are described. Possible applications of SpmTrien and its derivatives to the investigation of the enzymes of polyamine metabolism and spermine cellular functions, including interaction with DNA, are discussed.

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