[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][C][Ring1][Ring1][C][=Branch1][C][=O][N][C][C][N][Branch1][Branch1][C][C][Ring1][=Branch1][C][=Branch1][C][=O][C][=C][Branch2][Ring1][O][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][C][=N][N][C][=Branch1][C][=O][C][=C][C][=C][C][=C][Ring1][=Branch1][Ring1][O][F]"}, {"from": "gpt", "value": "The molecule is a small molecule inhibitor of the nuclear enzyme poly(ADP-ribose) polymerase (PARP) with potential chemosensitizing, radiosensitizing, and antineoplastic activities. Olaparib selectively binds to and inhibits PARP, inhibiting PARP-mediated repair of single strand DNA breaks; PARP inhibition may enhance the cytotoxicity of DNA-damaging agents and may reverse tumor cell chemoresistance and radioresistance. PARP catalyzes post-translational ADP-ribosylation of nuclear proteins and can be activated by single-stranded DNA breaks."}]