Showing structure for (2s,4'ar,4'br,8'ar,10'ar)-4'b,6,7,8',8',10'a-hexamethyl-2'-methylidene-3',4',4'a,5',6',8'a,9',10'-octahydro-3h-spiro[furo[3,2-c]pyran-2,1'-phenanthrene]-4,7'-dione