[{"from": "human", "value": "Describe this molecule. [C][C][C][=Branch1][C][=O][C][C][Ring1][=Branch1][C][#N]"}, {"from": "gpt", "value": "The molecule is an alicyclic ketone that is cyclopentanone substituted at position 3 by a cyano group. It is an alicyclic ketone and an aliphatic nitrile."}]