Showing structure for (1r,2s,5s,8r,9r,10s,11r,15r,18r)-9,10,15,16,18-pentahydroxy-12,12-dimethyl-6-methylidene-17-oxapentacyclo[7.6.2.1⁵,⁸.0¹,¹¹.0²,⁸]octadecan-7-one