[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][/C][=C][Branch1][C][\\C][/C][=Branch1][C][=O][O][C@@H1][C][C@@][Branch2][Ring1][O][/C][=C][/C][=Branch1][C][=O][/C][=Branch1][P][=C][\\C@@H1][C@@H1][Ring1][O][C][=Branch1][C][=C][C][=Branch1][C][=O][O][Ring1][#Branch1][/C][Branch1][C][C][O]"}, {"from": "gpt", "value": "The molecule is a sesquiterpene lactone of the heliangolide group isolated from Eupatorium kiirunense and exhibits cytotoxicity against human oral epidermoid (KB), cervical epitheloid (Hela) and liver (hepa59T/VGH) carcinoma cells. It has a role as a metabolite and an antineoplastic agent. It is an enoate ester, an enone and a sesquiterpene lactone. It is functionally related to a tiglic acid."}]