[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a gallate ester obtained by formal condensation of the carboxy group of gallic acid with the (3'R)-hydroxy group of procyanidin B2. It has a role as a metabolite and an antioxidant. It is a proanthocyanidin, a gallate ester, a polyphenol and a biflavonoid. It is functionally related to a gallic acid and a procyanidin B2."}, {"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][C][=Branch1][C][=O][C][=C][C][=Branch1][N][=C][Branch1][Branch2][C][=Branch1][Ring2][=C][Ring1][=Branch1][O][O][O]"}]