Showing structure for 6,8-dihydroxy-17,17-dimethyl-20-[(3-methylbut-2-en-1-yl)oxy]-5-(2-methylbut-3-en-2-yl)-3,12,18-trioxapentacyclo[11.8.0.0²,¹¹.0⁴,⁹.0¹⁴,¹⁹]henicosa-1(13),2(11),4,6,8,14(19),15,20-octaen-10-one