tert-Butyl 2-[4,7,10-tris[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]-1,4,7,10-tetrazacyclododec-1-yl]acetate (also named as BFCAs-1) is a polyamino polycarboxylic bifunctional chelating agent(BFCAs) with a broad range of applications in chemistry, biology and medicine and diagnostic imaging (MRI, SPECT, PET). e.g. it can be employed as a chelating agent in the preparation of gadolinium-based MRI contrast agent (GBCA).
The synthesis and application of polyamino polycarboxylic bifunctional chelating agents. 
Synthesis and characterization of a cell-permeable bimodal contrast agent targeting β-galactosidase.