Chart 1.
Structures of 1-Methlyene-(p-NitroPhenol)-1,4,7,10-tetraazacycloDOdecane-4,7,10-triAcetate (NP-DO3A) and 1-Methlyene- (p-NitroPhenol)-1,4,7,10-tetraazacycloDOdecane-4,7,10-triacetAMide (NP-DO3AM)
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