[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][=C][C][=Branch1][=C][=C][Branch1][=Branch1][C][=C][Ring1][=Branch1][C][N+1][=Branch1][C][=O][O-1][C][=C][C][=C][Branch1][Ring2][O][Ring1][Branch1][/C][=C][/C][=Branch2][Ring1][Branch2][=N][N][Branch1][Branch1][C][\\-Ring1][Branch1][=O][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][O][C]"}, {"from": "gpt", "value": "The molecule is a pyrazolone that is 5-methyl-4-methylene-2-(p-carboxyphenyl)-2,4-dihydro-3H-pyrazol-3-one in which the exocyclic carbon of the methylene group is attached to a 5-(4,5-dimethyl-2-nitrophenyl)furan-2-yl group by a single bond. C646 is a potent, cell permeable and selective competitive inhibitor of p300 and CBP (p300/CBP) histone acetyltransferases. It has a role as an EC 2.3.1.48 (histone acetyltransferase) inhibitor, an apoptosis inducer and a radiosensitizing agent. It is a member of furans, a biaryl, a pyrazolone, a member of benzoic acids and a C-nitro compound."}]