Showing structure for 3-(acetyloxy)-2,2',2',9,13-pentamethyl-6,16-dimethylidene-6',11,15-trioxo-10,14,17-trioxaspiro[pentacyclo[7.6.1.1⁷,¹².0¹,¹².0²,⁷]heptadecane-5,3'-pyran]-8-yl acetate