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PEGylated AB3 porphyrin with carboxylic acid bioconjugation handle, as described by the group of Vicente [150]. HOBt = 1-hydroxybenzotriazole, TBTU = O-(benzotriazol1-yl)N,N,N′,N′-tetramethyluronium tetrafluoroborate, DIEA = N,N-diisopropylethylamine.
