[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a member of flavans."}, {"from": "gpt", "value": "[C][C][=Branch2][Ring2][#Branch1][=C][C][C][=C][C][=Branch1][N][=C][Branch1][#Branch1][C][=C][Ring1][=Branch1][O][C][O][C][C@@H1][Branch1][S][C][C@H1][Branch1][Ring2][O][Ring1][=N][C][=C][C][=C][C][=C][Ring1][=Branch1][O][C][C]"}]