Showing structure for (2r)-2-methyl-1-[(1r,2r,11s)-7,9,15-trihydroxy-3,3,8,14,19,19-hexamethyl-16-[(2r)-2-methylbutanoyl]-4,12,18-trioxapentacyclo[11.7.1.0²,¹¹.0⁵,¹⁰.0¹⁷,²¹]henicosa-5(10),6,8,13,15,17(21)-hexaen-6-yl]butan-1-one