Showing structure for 7-[6'-(acetyloxy)-8'-hydroxy-4'a,7'-dimethyl-5-methylidene-2,4,4'-trioxo-2',4'b,5',6',7',8',8'a,10'a-octahydro-1'h-spiro[oxolane-3,3'-phenanthren]-2'-yl]hepta-2,4,6-trienoic acid