Synonyms: Pyridine,2,2',2'',2'''-[ethylenebis(nitrilodimethylene)]tetra- (8CI);N,N,N',N'-Tetrakis(2-pyridylmethyl)-1,2-ethanediamine;N,N,N',N'-Tetrakis(2-pyridylmethyl)ethylenediamine;N,N,N',N'-Tetrakis(pyridin-2-yl-methyl)ethylenediamine;TPEDA;TPEN;