[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a gamma-lactone that is oxolan-2-one substituted by a hexyl group at position 5. It has a role as a flavouring agent, a food additive and an anticonvulsant. It is a gamma-lactone and a tetrahydrofuranone."}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][O][Ring1][=Branch1]"}]