Showing structure for (1r,2r,5s,7r,8r,9s,10s,11r,18r)-7,9,10,18-tetrahydroxy-12,12-dimethyl-6-methylidene-17-oxapentacyclo[7.6.2.1⁵,⁸.0¹,¹¹.0²,⁸]octadecan-16-one