Showing structure for (1s,2r,3s,5s,8s,9s,10s,11r,15s)-3,9,10,15-tetrahydroxy-12,12-dimethyl-6-methylidene-17-oxapentacyclo[7.6.2.1⁵,⁸.0¹,¹¹.0²,⁸]octadecan-7-one