[{"from": "human", "value": "Please give me some details about this molecule. [C][C][=Branch1][C][=C][C@H1][C][C@H1][C@@H1][Branch1][#Branch2][C][C@][Ring1][=Branch1][Branch1][C][C][C][=C][O][C][=Branch1][C][=O][C][Ring1][O][=C]"}, {"from": "gpt", "value": "The molecule is a sesquiterpene lactone that is hexahydro-1-benzofuran-2(3H)-one substituted by a methyl group at position 6, methylene group at position 3, isopropenyl group at position 5 and a vinyl group at position 6. Isolated from Inula helenium and Rudbeckia laciniata, it exhibits antiproliferative activity. It has a role as a metabolite and an antineoplastic agent."}]