[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][=C][C][=Branch1][C][=O][C@H1][C][C@@H1][Ring1][#Branch1][C][Ring1][Ring2][Branch1][C][C][C]"}, {"from": "gpt", "value": "The molecule is a 4,6,6-trimethylbicyclo[3.1.1]hept-3-en-2-one in which both chiral centres have S configuration. It has a role as an expectorant. It is an enantiomer of a (R)-(+)-verbenone."}]