[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a proanthocyanidin consisting of two molecules of (-)-epicatechin joined by a (4alpha->8)-linkage. It has a role as a metabolite. It is a hydroxyflavan, a proanthocyanidin, a polyphenol and a biflavonoid. It is functionally related to a (-)-epicatechin."}, {"from": "gpt", "value": "[C][C@H1][Branch2][=Branch1][#C][C@H1][Branch2][Branch1][=N][O][C][=C][Ring1][=Branch1][C][=Branch2][Branch1][Ring1][=C][C][=Branch2][Ring2][=N][=C][Ring1][=Branch1][C@H1][C@H1][Branch2][Ring2][Ring2][C@H1][Branch2][Ring1][C][O][C][=C][C][=Branch1][O][=C][C][=Branch1][=Branch1][=C][Ring1][#Branch2][Ring1][=Branch1][O][O][C][=C][C][=Branch1][=Branch2][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][O][O][O][O][C][=C][C][=Branch1][=Branch2][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][O][O]"}]