SMILES: C/C=C(\\C)/C(=O)O[C@@H]1C[C@@]2([C@H](O2)C[C@@H](/C(=C/[C@@H]3[C@@H]1C(=C)C(=O)O3)/C)O)C
Description: The molecule is a sesquiterpene lactone of the heliangolide group isolated from Eupatorium kiirunense and Calea rotundifolia and exhibits cytotoxicity against human oral epidermoid (KB), cervical epitheloid (Hela) and liver (hepa59T/VGH) carcinoma cells. It has a role as an antineoplastic agent and a metabolite. It is a sesquiterpene lactone, an epoxide and an enoate ester. It derives from a tiglic acid.