[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][Branch1][C][C][C][C@@H1][Branch2][N][=Branch2][C][=Branch1][C][=O][N][C@@H1][Branch1][Ring1][C][O][C][=Branch1][C][=O][N][C@@H1][Branch1][=N][C][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][C][=Branch1][C][=O][N][C@@H1][Branch1][#Branch2][C][C][C][N][C][=Branch1][C][=N][N][C][=Branch1][C][=O][N][C][C][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][N][N][C][=Branch1][C][=O][C@H1][Branch1][#Branch2][C][C][C][N][C][=Branch1][C][=N][N][N][C][=Branch1][C][=O][C@H1][Branch1][=N][C][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][N][C][=Branch1][C][=O][C@H1][Branch1][Ring1][C][O][N][C][=Branch1][C][=O][C@H1][Branch1][#Branch1][C][C][Branch1][C][C][C][N][C][=Branch1][C][=O][C@H1][Branch1][Ring1][C][O][N][C][=Branch1][C][=O][C@H1][Branch1][=Branch1][C][Branch1][C][C][C][N][C][=Branch1][C][=O][C][N][C][=Branch1][C][=O][C@H1][Branch1][=Branch1][C][C][C][C][N][N][N][C][=Branch1][C][=O][C@H1][Branch1][Ring1][C][O][N][C][=Branch1][C][=O][C@H1][Branch1][=Branch1][C][Branch1][C][C][C][N][C][=Branch1][C][=O][C][N][C][=Branch1][C][=O][C@H1][Branch1][=Branch1][C][C][C][C][N][N]"}, {"from": "gpt", "value": "The molecule is a stromal cell-derived factor 1 (SDF-1; CXCL12) analog and inhibitor of C-X-C chemokine receptor type 4 (CXCR4), with potential antineoplastic activity. Upon administration, PTX-9908 selectively targets and binds to CXCR4, thereby preventing the binding of CXCR4 to its ligand SDF-1. This inhibits receptor activation and results in decreased proliferation and migration of CXCR4-overexpressing tumor cells. The G protein-coupled receptor CXCR4, which is overexpressed in several tumor cell types, promotes tumor angiogenesis, tumor cell proliferation, survival, invasion and metastasis. SDF-1, a major chemotactic factor, plays a key role in mediating cell trafficking via selective binding to CXCR4."}]