[{"from": "human", "value": "Describe this molecule. [C][C][=Branch1][C][=O][N][C][C][C][C@H1][Ring1][Branch1][C][=Branch1][C][=O][N][C@@H1][Branch1][=Branch2][C][C][=C][N][=C][N][Ring1][Branch1][C][=Branch1][C][=O][N][C@@H1][Branch1][Ring1][C][O][C][=Branch1][C][=O][N][C@@H1][Branch1][Ring1][C][S][C][=Branch1][C][=O][N][C@@H1][Branch1][#Branch1][C][C][=Branch1][C][=O][N][C][=Branch1][C][=O][N]"}, {"from": "gpt", "value": "The molecule is a small peptide antagonist of integrin alpha5beta1 with potential antineoplastic activity. ATN-161 selectively binds to and blocks the receptor for integrin alpha5beta1, thereby preventing integrin alpha5beta1 binding. This receptor blockade may result in inhibition of endothelial cell-cell interactions, endothelial cell-matrix interactions, angiogenesis, and tumor progression. Integrin alpha5beta1 is expressed on endothelial cells and plays a crucial role in endothelial cell adhesion and migration."}]