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FLT3-IN-28 (Compound 12y) is an orally active FLT3 inhibitor with antitumor activity. FLT3-IN-28 selectively inhibits cancer cells harboring the FLT3 internal tandem duplication (ITD) mutation, with IC₅₀ values of 85, 290, 130, 65, and 220 nM for BaF3-FLT3-ITD, BaF3-TEL-VEGFR2, MV4-11, MOLM-13, and MOLM-14 cell lines respectively (MV4-11 and MOLM-13/14 are acute myeloid leukemia (AML) cell lines carrying the FLT3-ITD mutation). Additionally, FLT3-IN-28 can downregulate the phosphorylation levels of FLT3 and STAT5 in MOLM-13 cells and induce cell cycle arrest and Apoptosis. FLT3-IN-28 has an oral bioavailability of 19.2% in SD rats and can prolong survival in a dose-dependent manner in NSG mice xenografted with MOLM-13 cells. FLT3-IN-28 holds promise for research in cancer fields related to FLT3-ITD .

NH2-UAMC1110 is an aminobutoxy derivative of the fibroblast activation protein (FAP) inhibitor UAMC1110 (HY-100684), and is a precursor compound for the synthesis of FAP inhibitor probes, not directly used in bioactivity experiments. For example, NH2-UAMC1110 is involved in the synthesis of the radiotracer FAPI-QS, which exhibits high tumor selectivity and high dose-response, and has been used for tumor diagnosis. NH2-UAMC1110 introduces an active amino group into its structure, enabling it to form covalent bonds with various molecules (such as DOTA, DATA5m, radionuclide chelators, etc.), thereby synthesizing molecular imaging probes or targeted compounds with the ability to target FAP. NH2-UAMC1110 specifically binds to the FAP active site, inhibiting its proline-selective serine protease activity (including dipeptidyl peptidase and endopeptidase activity), blocking FAP-mediated tissue remodeling processes. Its key activity is high targeting and high affinity, and its core function is to be coupled with bifunctional chelators (such as DOTA, DATA5m) as a targeting module. NH2-UAMC1110 can be applied to diagnostic imaging studies of tumors expressing FAP (such as colorectal cancer, pancreatic cancer, etc.), and also provides molecular tools for targeted research of FAP-related diseases with high FAP expression, such as fibrosis and arthritis .

NH2-UAMC1110 TFA is an aminobutoxy derivative of the fibroblast activation protein (FAP) inhibitor UAMC1110 (HY-100684), and is a precursor compound for the synthesis of FAP inhibitor probes, not directly used in bioactivity experiments. For example, NH2-UAMC1110 TFA is involved in the synthesis of the radiotracer FAPI-QS, which exhibits high tumor selectivity and high dose effect, and has been used in tumor diagnosis. NH2-UAMC1110 TFA structurally incorporates an active amino group, allowing it to form covalent bonds with various molecules (such as DOTA, DATA5m, radionuclide chelators, etc.) to synthesize molecular imaging probes or targeted compounds with the ability to target FAP. NH2-UAMC1110 TFA specifically binds to the FAP active site, inhibiting its proline-selective serine protease activity (including dipeptidyl peptidase and endopeptidase activity), blocking FAP-mediated tissue remodeling-related processes. Its key activity is high targeting and high affinity, and its core function is to act as a targeting module coupled with bifunctional chelators (such as DOTA, DATA5m). NH2-UAMC1110 TFA can be applied to diagnostic imaging studies of tumors expressing FAP (such as colorectal cancer, pancreatic cancer, etc.), and also provides molecular tools for targeted research of FAP-related diseases with high FAP expression, such as fibrosis and arthritis .