Showing structure for (1's,3r,3'r,3as,7r,7'r,8as,9's,10's)-12'-acetyl-10'-hydroxy-7,9'-dimethyl-4'-methylidene-6-(3-oxobutyl)-4,7,8,8a-tetrahydro-3ah-6'-oxaspiro[cyclohepta[b]furan-3,13'-tricyclo[8.4.0.0³,⁷]tetradecan]-11'-ene-2,5'-dione