Metallostars developed by Livramento et. al.: A) bpy-DTTA ligand, B) a framework molecular model after ligand assembly with Fe(II) and Gd(III), and C) their NMRD profiles for Gd-DTTA-bpy without Fe(II) (black triangles) and with Fe(II) (white circles).73 Figure adapted from Livramento, J. B.; Toth, E.; Sour, A.; Borel, A.; Merbach, A. E.; Ruloff, R.; Angew. Chem. Int. Ed. 2005, 44, 1480 with permission. Copyright 2005 Wiley Publishing.73