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. Author manuscript; available in PMC: 2017 Apr 11.
Published in final edited form as: Angew Chem Int Ed Engl. 2016 Mar 8;55(16):5024–5027. doi: 10.1002/anie.201511649

Figure 1.

Figure 1

Structure of 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid 1 and 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid tetra(glycine amide) 2.