[{"from": "human", "value": "Describe this molecule. [C][N][C][C][C][Branch1][=Branch1][C][Ring1][Branch1][C][O][C][=C][Branch2][Ring1][=N][C][=C][Branch2][Ring1][#Branch1][C][=C][Ring1][=Branch1][O][C][=Branch1][=Branch1][=C][C][Ring1][=Branch1][=O][C][=C][C][=C][C][=C][Ring1][=Branch1][Cl][O][O]"}, {"from": "gpt", "value": "The molecule is a flavone and cyclin dependent kinase (CDK) inhibitor with potential antineoplastic activity. Riviciclib selectively binds to and inhibits Cdk4/cyclin D1, Cdk1/cyclin B and Cdk9/cyclin T1, serine/threonine kinases that play key roles in the regulation of the cell cycle and cellular proliferation. Inhibition of these kinases leads to cell cycle arrest during the G1/S transition, thereby leading to an induction of apoptosis, and inhibition of tumor cell proliferation."}]