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- W2030402298 abstract "A new tetraazamacrocyclic ligand (L) with four neutral 2-cyanoethyl pendent groups, and its divalent transition-metal complexes [Co(L)(NO3)]NO3·H2O (1), [Ni(L)(NO3)]NO3·3H2O (2) and [Cu(L)(H2O)](NO3)2 (3) have been synthesized. The crystal structures of 1 and 3 have been determined by X-ray analysis. In complex 1 the cobalt atom is coordinated by four nitrogen atoms and two oxygen atoms of a nitrate anion, which define a distorted octahedron. The other nitrate ion lies in the lattice as a counter ion. Complex 3 is five-coordinated by four nitrogen atoms and an axial aqua ligand, which form a tetragonal pyramid. In complex 3 the two nitrate anions exist as counter ions. Pharmaceutical tests showed that all three metal complexes exhibit antitumor activity against HL-60 and BEL-7404 tumor cell lines in vitro, even at a concentration of 10−8 mol l−1. Complex 1 can partially cleave supercoiled pBR 322 DNA to form nicked DNA in aerobic solution, and complex 3 can convert double strand DNA into nicked DNA completely in the presence of MPA. Complex 3 causes perturbation to K562 tumor cell lines in the G1 phase." @default.
- W2030402298 created "2016-06-24" @default.
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- W2030402298 title "New tetraazamacrocyclic ligand with neutral pendent groups 1,4,7,10-tetrakis(2-cyanoethyl)-1,4,7,10-tetraazacyclododecane (L) and its cobalt(II), nickel(II) and copper(II) complexes: synthesis, structural characterization and antitumor activity" @default.
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- W2030402298 doi "https://doi.org/10.1016/s0277-5387(99)00369-1" @default.
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