[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C@@H1][C@H1][Branch1][N][C][=C][C][=C][C][=C][Ring1][=Branch1][O][Ring1][#Branch2][O][C][=C][C][=C][C][=C][Ring1][S][Ring1][=Branch1]"}, {"from": "gpt", "value": "The molecule is the (6aR,11aR)-enantiomer of pterocarpan. It is an enantiomer of a (6aS,11aS)-pterocarpan."}]