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