... Gd concentrations. This modularly designed contrast agent represents a new tool for improved monitoring and evaluation of interventions at the gene transcription level. Also, a widespread monitoring ... synthesis and application of a GdxSc3-xN@C80-BioShuttle-conjugate referred to as Gd-cluster@-BioShuttle, which features high proton relaxation and, in comparison to the commonly used contrast agents, ... derivative was converted with thionyl chloride under standard conditions to the corresponding acidic chloride. To a suspension of this acid chloride (2 mmol) in 20 ml CH2Cl2, a solution of 3-amino...