Formula: C27H36O4 | Mol. Weight: 424.60 g/mol
IUPAC: (4aR,4bR,8S,8aR,10aR)-1,1,4a,6',7',8a-hexamethyl-7-methylidenespiro[3,4,4b,5,6,9,10,10a-octahydrophenanthrene-8,2'-3H-furo[3,2-c]pyran]-2,4'-dione
CC1=C(OC(=O)C2=C1OC3(C2)C(=C)CCC4C3(CCC5C4(CCC(=O)C5(C)C)C)C)C