Abstract: Provided are a fibroblast activation protein inhibitor (FAPI) dimer compound, an FAPI dimer-based positron emission tomography (PET) imaging agent for tumor diagnosis, and a preparation method and use thereof. An amphiphilic polyethylene glycol (PEG) chain and a dimerized structure of FAPI in the FAPI dimer compound with a structure shown in formula I can improve the in vivo kinetic properties of the compound and prolong a residence time of the compound in a tumor, thereby improving the uptake and imaging effects in the tumor. The accurate tumor diagnosis can be achieved by labeling the FAPI dimer compound with a diagnostic nuclide (68Ga), which has promising application prospects in PET imaging for diagnosis and in the preparation of a therapeutic nuclide (such as 177Lu or 90Y)-labeled drug for treating a FAP-?-expressing tumor.

Abstract: An organic compound represented by the following general formula (I) wherein n is an integer from 1 to 500, inclusive, and R1 and R2 are each independently a moiety having an atom length of from about 8 atoms to about 20 atoms.

Abstract: An organic compound represented by the following general formula (I) wherein n is an integer from 1 to 500, inclusive, and R1 and R2 are each independently a moiety having an atom length of from about 8 atoms to about 20 atoms.

Abstract: The present invention relates to a small peptide for anti-angiogenesis and use thereof, in particular, to a small peptide useful for treating angiogenesis diseases; a polynucleotide coding the peptide; a vector and a cell comprising the polynucleotide; a pharmaceutical composition comprising the small peptide, the fused peptide or the fused protein, the polynucleotide, the vector and/or the cell. The small peptide, the fused peptide or the fused protein, the polynucleotide, the vector, the cell and/or the pharmaceutical composition can be used for treatment of associated diseases such as tumor by anti-angiogenesis.