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KONG De-Yuan, XIE Yu-Yuan. New Tetraazamacrocyclic Ligand with Neutral Pendent Groups 1,4,7,10-tetrakis (2-cyanoethyl)-l,4,7,10-tetraazacyclododecane (L) and Its Cobalt (Ⅱ), Nickel (Ⅱ) and Copper (Ⅱ) Complexes:Synthesis, Structural Characterization and Antitumor Activities[J]. Chem. J. Chinese Universities, 2000, 21(S1): 158.