NH2-MPAA-NODA contains the 1,4,7-triazacyclononane-1,4-diacetate (NODA) motif with a methyl phenyl acetic acid (MPAA) backbone, and it has enough ability to form stable Al18F-chelates. The organ of luoroaluminates are easily accessible from the reaction of 1 and AlF3.NH2-MPAA-NODA can be conjugated to some inhibitors/antagonists labeled with 18F for PET imaging of targeting tumors. It also can be used as a radiolabel of peptides