Showing structure for 2-[2-hydroxy-6-(3-methoxy-3-oxopropyl)-3a,6,9b-trimethyl-7-(prop-1-en-2-yl)-1h,2h,3h,4h,5h,7h,8h,9h-cyclopenta[a]naphthalen-3-yl]-6-methyl-5-methylideneheptanoic acid