You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (3E,3aS,5aR,6R,7S,9aR,9bS)-7-hydroxy-3a,6,9a-trimethyl-3-[(3E,5E)-6-methyl-7-oxohepta-3,5-dien-2-ylidene]-2-oxo-1,4,5,5a,7,8,9,9b-octahydrocyclopenta[a]naphthalene-6-carboxylic acid .
user
C25H34O5
assistant