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Table 1 Analytical data of the purified chelator-peptide conjugates

From: The tetraamine chelator outperforms HYNIC in a new technetium-99m-labelled somatostatin receptor 2 antagonist

Compound Sequence Molecular weight (g/mol) m/z (calc.) MS (ESI):(m/z) Purity (%)
SS-03 DOTA-(4-Cl)-Phe-Cyclo(D-Cys-Tyr-D-Trp-Lys-Thr-Cys)-D-Tyr-NH2 1531.15 1529.59 767.2 [M+2H]++ 99.5
1531.8 [M+H]+
SS-04 N4-(4-Cl)-Phe-Cyclo(D-Cys-Tyr-D-Trp-Lys-Thr-Cys)-D-Tyr-NH2 1331.01 1329.56 667.7 [M+2H]++ 98
1332 [M+H]+
SS-05 HYNIC-(4-Cl)-Phe-Cyclo(D-Cys-Tyr-D-Trp-Lys-Thr-Cys)-D-Tyr-NH2 1279.88 1278.45 642 [M+2H]++ 97
1280.8 [M+H]+