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