[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a sesquiterpene lactone that is 3,3a,4,4a,7a,8,9,9a-octahydroazuleno[6,5-b]furan-2,5-dione substituted by methyl groups at positions 4a and 8 and a methylidene group at position 3. Isolated from the aerial parts of Inula hupehensis, it exhibits anti-inflammatory activity. It has a role as a metabolite, an anti-inflammatory agent and a plant metabolite. It is a gamma-lactone, a sesquiterpene lactone, a cyclic ketone and an organic heterotricyclic compound."}, {"from": "gpt", "value": "[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]"}]