| http://www.w3.org/ns/prov#value | - More particularly, as used herein, a macrocyclic chelant is defined as a chelant having one continuous, linked, closed backbone consisting of donor atoms, such as for example N, P, B, O, S and As, spaced by carbon atoms e.g. carbons or optionally substituted methylene or cyclic, e.g. aromatic, groups or chains thereof, particularly preferably optionally substituted C2-4 alkylene chains.
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