Showing structure for (1r,2s,3s,5r,9r,10r,11r,12s,13s,16s)-3,9,12-trihydroxy-2,6,10,16-tetramethyl-14-oxatetracyclo[11.2.1.0²,¹¹.0⁵,¹⁰]hexadec-6-ene-8,15-dione