IUPAC: (3aS,4S,7S,8aR)-4-hydroxy-7-methyl-3-methylidene-6-(3-oxobutyl)-2H,3H,3aH,4H,7H,8H,8aH-cyclohepta[b]furan-2-one

SMILES: C[C@H]1C[C@H]2OC(=O)C(=C)[C@H]2[C@@H](O)C=C1CCC(C)=O |c:13|