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. Author manuscript; available in PMC: 2021 Oct 5.
Published in final edited form as: J Am Chem Soc. 2021 Jun 30;143(27):10429–10440. doi: 10.1021/jacs.1c05339

Table 4.

Apparent Molar Activity (AMA, Ci·μmol−1) of 135La3+ and 44Sc3+ Radiolabeling with Ligands py-macrodipa, macrodipa, and DOTA.

Radiolabeling Conditions 135La3+ 44Sc3+
py-macrodipa pH 5.5
25 °C		 15 min 1.488 0.798
30 min 1.363 0.888
60 min 1.709 0.733
macrodipa pH 5.5
25 °C		 15 min 0.105 0.006
30 min 0.088 0.004
60 min 0.095 0.004
DOTA pH 5.5
80 °C		 15 min 0.005 0.419
30 min 0.020 0.395
60 min 0.030 0.464