[{"from": "human", "value": "What can you tell me about this molecule? [C][C@@H1][Branch2][=Branch1][S][C@H1][Branch2][Branch1][=C][O][C][=C][Ring1][=Branch1][C][=Branch2][Branch1][Ring2][=C][Branch1][Branch2][C][=Branch1][Ring2][=C][Ring1][=Branch1][O][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][C][=C][C][=Branch1][=Branch2][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][O][O]"}, {"from": "gpt", "value": "The molecule is a proanthocyanidin consisting of two molecules of (+)-catechin joined by a bond between positions 4 and 6' in alpha-configuration. Procyanidin B6 is isolated from leaves and fruit of cowberry Vaccinium vitis-idaea and other plants. It can also be found in grape seeds and in beer. It has a role as a metabolite. It is a hydroxyflavan, a proanthocyanidin and a biflavonoid. It is functionally related to a (+)-catechin."}]