Showing structure for (1r,2r,8r,11r,12r,15s,16r)-2,7,7,11,12-pentamethyl-15-[(2r)-2-methyl-5-oxooxolan-2-yl]-6-oxatetracyclo[9.7.0.0²,⁸.0¹²,¹⁶]octadecan-5-one