Showing structure for (3z,5r)-3-{[(1as,2s,3s,3ar,4s,7ar,7br)-2-[(2e)-but-2-en-2-yl]-1a,4-dimethyl-octahydro-2h-naphtho[1,2-b]oxiren-3-yl](hydroxy)methylidene}-5-isopropyl-1-methylpyrrolidine-2,4-dione