Showing structure for (1r,2s,8r,9r,10s,11s,12s,13s,16s)-8,9,12-trihydroxy-2,6,10,16-tetramethyl-14-oxatetracyclo[11.2.1.0²,¹¹.0⁵,¹⁰]hexadeca-4,6-diene-3,15-dione