SMILES: CC1(C[C@H]2C=C([C@H]3[C@]2(C1)[C@@]4(CO4)C(=O)OC3)C(=O)O)C
Description: The molecule is a tetracyclic sesquiterpene lactone obtained by formal epoxidation of the 4-methylene group of pentalenolactone E. It has a role as a bacterial metabolite. It is a sesquiterpene lactone, an organic heterotricyclic compound, a spiro-epoxide and an alpha,beta-unsaturated monocarboxylic acid. It is a conjugate acid of a pentalenolactone F(1-).