Try searching for...
SCFBio, IIT Delhi
Formula: C20H28O3 | Mol. Weight: 316.40 g/mol
IUPAC: (1S,4aR,4bS,7S,8aS,10aS)-7-ethenyl-3-hydroxy-4b,7,10a-trimethylspiro[5,6,8,8a,9,10-hexahydro-4aH-phenanthrene-1,2'-oxirane]-2-one
CC1(CCC2(C(C1)CCC3(C2C=C(C(=O)C34CO4)O)C)C)C=C