[{"from": "human", "value": "Could you provide a description of this molecule? [C][C][N][C][C][C][Ring1][=Branch1][N][C][=Branch1][C][=O][C][=C][Branch1][=Branch1][C][=N][N][Ring1][Branch1][N][C][=Branch1][C][=O][C][=C][Branch1][Branch2][C][=C][C][=C][Ring1][=Branch1][Cl][Cl]"}, {"from": "gpt", "value": "The molecule is a selective inhibitor of certain Cyclin Dependent Kinases (CDKs) leading to tumour regression. It is developed by Astex for the treatment of solid tumours and haematological malignancies."}]