Showing structure for 3-[(3s,3as,5as,6r,7s)-3,3a,6-trimethyl-3-[(2r)-1-[(2z)-4-methyl-5-oxofuran-2-ylidene]propan-2-yl]-7-(prop-1-en-2-yl)-1h,2h,4h,5h,5ah,7h-cyclopenta[a]naphthalen-6-yl]propanoic acid