Showing structure for methyl (2r,6r)-6-[(3r,3ar,5as,6s,7s,9br)-6-(3-methoxy-3-oxopropyl)-3a,6,9b-trimethyl-7-(prop-1-en-2-yl)-1h,2h,3h,4h,5h,5ah,7h,8h-cyclopenta[a]naphthalen-3-yl]-2-methyl-4-oxoheptanoate