[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a pseudoguaianolide with anti-inflammatory activity isolated from the aerial parts of Inula hupehensis. It has a role as an anti-inflammatory agent and a plant metabolite. It is a gamma-lactone, a cyclic ketone, an organic heterotricyclic compound, a pseudoguaianolide and an acetate ester."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][O][C][C@@H1][C][C@H1][C@H1][Branch1][#C][C][C@][Branch1][#Branch2][C@H1][Ring1][#Branch1][C][C][C][Ring1][Branch1][=O][C][C][=Branch1][C][=C][C][=Branch1][C][=O][O][Ring1][#C]"}]