N,N'-Bis-(2-aminoethyl)-butan-1,4-diamin;1,4,9,12-tetraazadodecane;N1,N1'-(butane-1,4-diyl)bis(ethane-1,2-diamine);N,N'-bis(2-aminoethyl)-1,4-diaminobutane;N,N'-bis(2-aminoethyl)-butane-1,4-diamine;
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