[{"from": "human", "value": "Could you provide a description of this molecule? [C][/C][=C][Branch1][C][\\C][/C][=Branch1][C][=O][O][C@@H1][C][C@@][Branch2][Ring1][P][C@H1][Branch1][Ring2][O][Ring1][Ring1][C][C@H1][Branch2][Ring1][Branch1][/C][=Branch1][P][=C][/C@@H1][C@@H1][Ring1][O][C][=Branch1][C][=C][C][=Branch1][C][=O][O][Ring1][#Branch1][/C][O][C]"}, {"from": "gpt", "value": "The molecule is a sesquiterpene lactone that is a 3alpha-hydroxy epimer of heliangin. Isolated from Eupatorium kiirunense, it 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 epoxide and a sesquiterpene lactone. It is functionally related to a tiglic acid."}]