CAS: 546-43-0 Molecular Formula: C15H20O2 Molecular Weight (g/mol): 232.32 MDL Number: MFCD00274568 InChI Key: PXOYOCNNSUAQNS-AGNJHWRGSA-N Synonym: alantolactone,helenine,eupatal,alant camphor,inula camphor,helenin,elecampane camphor,unii-m7gsn5q1m6,m7gsn5q1m6,3ar,5s,8ar,9ar-5,8a-dimethyl-3-methylidene-3a,5,6,7,8,8a,9,9a-octahydronaphtho 2,3-b furan-2 3h-one PubChem CID: 72724 ChEBI: CHEBI:2540 IUPAC Name: (3aR,5S,8aR,9aR)-5,8a-dimethyl-3-methylidene-2H,3H,3aH,5H,6H,7H,8H,8aH,9H,9aH-naphtho[2,3-b]furan-2-one SMILES: C[C@H]1CCC[C@]2(C)C[C@H]3OC(=O)C(=C)[C@H]3C=C12