[{"from": "human", "value": "Provide a description of this molecule. [C][C][Branch2][Branch1][=Branch2][C@@H1][Branch2][Ring1][S][N][C@H1][Branch1][Ring2][S][Ring1][Branch1][C@@H1][Branch1][Branch1][C][Ring1][Branch1][=O][N][C][=Branch1][C][=O][C@@H1][Branch1][=Branch2][C][=C][C][=C][C][=C][Ring1][=Branch1][N][C][=Branch1][C][=O][O][C][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][O][Ring1][#Branch2][C]"}, {"from": "gpt", "value": "The molecule is a penicillanic acid ester that is the 1-phthalidyl ester of ampicillin. It is a prodrug of ampicillin. It has a role as a prodrug. It is functionally related to an ampicillin and an o-phthalaldehydic acid."}]